Ashutosh Kumar

Scopus Publications

Tuning functional properties of 3-D printed ferroelectric ceramics using different architectures
Abhijit Pramanick, Chaimae Babori, Frédéric Albertini, Frederik Holm Gjørup, Ashutosh Kumar, et al.
Journal of the European Ceramic Society, 2026
Tailored Thermal and Mechanical Performance of Biodegradable PLA-P(VDF-TrFE) Polymer Blends
G. Suresh, B. Satyanarayna, C. Thirmal, Kaushal Jagarlamudi, T. Komala, et al.
Journal of Applied Polymer Science, 2026
The development of polymer blends has emerged as a strategic approach for designing multifunctional materials with enhanced tailored characteristics. Current work investigates and reports the structure–property relationships in free‐standing blend films of poly(vinylidene fluoride‐trifluoroethylene) (P(VDF‐TrFE)) and polylactic acid (PLA), prepared to evaluate their suitability for functional applications. For this investigation, films of nearly 40 μm thick were fabricated by systematically varying the P(VDF‐TrFE):PLA ratio. Thermal analysis revealed a higher PLA crystallinity at 25% P(VDF‐TrFE) content, while Fourier‐transform infrared spectroscopy showed the electroactive β‐phase fraction to be highest in the 50:50 composition. These findings correlated with tensile strength measurements and morphology, demonstrating that molecular ordering and phase distribution significantly influence the mechanical performance. The 25:75 blend exhibited superior mechanical strength due to enhanced PLA crystallization and polymer chain alignment. In contrast, the 50:50 blend achieved a balance between tensile strength and electroactive phase development, marking it a promising candidate for sensors and 3D printing applications. At higher P(VDF‐TrFE) content, reduced crystallinity in PLA resulted in softer, more compliant films which would be suitable for flexible electronic applications. These results establish a pathway to tune mechanical and functional properties in semicrystalline polymer blends through facile compositional control.
Magnetocaloric properties of Sb, Ge, and Ga doped AlFe2B2
R. Preyadarshini, S. Kavita, A. Kumar, D. Sivaprahasam
Journal of Magnetism and Magnetic Materials, 2026
Nonlinearity and Domain Switching in a 3D-Printed Architected Ferroelectric
Abhijit Pramanick, Chaimae Babori, Frédéric Albertini, Frederik Holm Gjørup, Aurore Brézard Oudot, et al.
Advanced Engineering Materials, 2025
Recent advances in 3D printing have enabled fabrication of architected functional ceramics with tunable functionalities at reduced weight and cost. An essential cornerstone of materials design is to determine structure–property relations. For polycrystalline ferroelectrics, such relationships can be complex due to several microscopic mechanisms, such as lattice strains and/or domain switching, which show nonlinear dependence on external stimuli and are furthermore dependent on grain orientations. For architected materials, these microscopic mechanisms can also be spatially nonuniform. Herein, the development of appropriate methodology is entailed to correlate functional properties of architected ferroelectrics with spatial‐ and orientation‐resolved microscopic mechanisms. Herein, using in situ orientation‐resolved X‐ray microdiffraction, it is shown that nonlinear polarization and strain responses in a 3D‐printed architected ferroelectric are driven by localized progression of non‐180° domain switching, which depends not only on the internal distribution of electric‐field lines but also on the evolving long‐range stress fields resulting from inhomogeneous domain‐switching transformation strains. In this current study, it is indicated that nonlinear behavior in architected ferroelectrics can be effectively tuned by appropriate design of sample geometry, which controls the internal electric‐field distribution in the material.
Dopant-induced structural modifications and thermoelectric properties in Al1.2Fe1.9M0.1B₂ intermetallic borides (M = Ag, Ni, Sb, Ga, Ge)
D. Sivaprahasam, R. Preyadarshini, A. Kumar
Applied Physics A Materials Science and Processing, 2025
Boosting Thermoelectric Performance in Nanocrystalline Ternary Skutterudite Thin Films through Metallic CoTe2 Integration
Bhawna Jarwal, Suman Abbas, Ta-Lei Chou, Suneesh M. Vailyaveettil, Ashutosh Kumar, et al.
ACS Applied Materials and Interfaces, 2024
Thermoelectric Properties of High-Entropy Wolframite Oxide: (CoCuNiFeZn)1−xGaxWO4
Ashutosh Kumar, Adrien Moll, Mouhamad Navid Mouhamadsiradjoudine, François Brisset, David Berardan, et al.
Physica Status Solidi Rapid Research Letters, 2024
Herein, the synthesis of high‐entropy wolframite oxide (CoCuNiFeZn)1‐xGaxWO4 through standard solid‐state route followed by spark plasma sintering and their structural, microstructural, and thermoelectric (TE) properties are investigated. X‐ray diffraction pattern followed by patterns matching refinement shows a monoclinic structure with the volume of the unit cell decreasing with increasing Ga content. The optical bandgap for these oxides shows a cocktail effect in high‐entropy configuration. The Seebeck coefficient indicates electrons as dominating charge carriers with a nondegenerate behavior. The electrical resistivity decreases with increasing temperature depicting a semiconducting nature. Thermal conductivity in high‐entropy samples (κ ≈ 2.1 W m−1 K−1 @ 300 K) is significantly lower as compared to MgWO4 (κ ≈ 11.5 W m−1 K−1 @ 300 K), which can be explained by the strong phonon scattering due to large lattice disorder in high‐entropy configuration. The TE figure of merit zT increases with Ga doping via modifying all three TE parameters positively.
Novel entropy-stabilized fluorite oxides with multifunctional properties
Ashutosh Kumar, David Bérardan, Francois Brisset, Diana Dragoe, Nita Dragoe
Journal of Materials Chemistry A, 2023
Entropy-stabilized fluorite oxides having multifunctional properties.
Effect of crystal field engineering and Fermi level optimization on thermoelectric properties of Ge1.01Te: Experimental investigation and theoretical insight
Ashutosh Kumar, Preeti Bhumla, Duraisamy Sivaprahasam, Saswata Bhattacharya, Nita Dragoe
Physical Review Materials, 2023
This study shows a method of enhancing the thermoelectric properties of GeTe-based materials by Ti and Bi co-doping on cation sites along with self-doping with Ge via simultaneous optimization of electronic (via crystal field engineering, and precise Fermi level optimization) and thermal (via point-defect scattering) transport properties. The pristine GeTe possesses high carrier concentration ($n$) due to intrinsic Ge vacancies, low Seebeck coefficient ($\\alpha$), and high thermal conductivity ($\\kappa$). The Ge vacancy optimization and crystal field engineering results in an enhanced $\\alpha$ via excess Ge and Ti doping, which is further improved by band structure engineering through Bi doping. As a result of improved $\\alpha$ and optimized Fermi level (carrier concentration), an enhanced power factor ($\\alpha^2\\sigma$) is obtained for Ti--Bi co-doped Ge$_{1.01}$Te. These experimental results are also evidenced by theoretical calculations of band structure, and thermoelectric parameters using density functional theory and Boltztrap calculations, respectively. A significant reduction in the phonon thermal conductivity ($\\kappa_{ph}$) from $\\sim$ 3.5 W.m$^{-1}$.K$^{-1}$ to $\\sim$ 1.06 W.m$^{-1}$.K$^{-1}$ at 300\\,K for Ti--Bi co-doping in GeTe, attributed to point-defect scattering due to mass and strain field fluctuation, in line with the Debye-Callaway model. The phonon dispersion calculations show a decreasing group velocity in Ti--Bi co-doped GeTe, supporting the obtained reduced $\\kappa_{ph}$. The strategies used in the present study can significantly increase the effective mass, optimize the carrier concentration, and decrease phonon thermal conductivity while achieving an impressive maximum zT value of 1.75 at 773\\,K and average zT (zT$_{av}$) of 1.03 for Ge$_{0.91}$Ti$_{0.02}$Bi$_{0.08}$Te over a temperature range of 300-773\\,K.
Magnetic and electrical properties of high-entropy rare-earth manganites
Ashutosh Kumar, David Bérardan, Diana Dragoe, Eric Riviere, Tomohiro Takayama, et al.
Materials Today Physics, 2023
Thermoelectric properties of high-entropy rare-earth cobaltates
Ashutosh Kumar, Diana Dragoe, David Berardan, Nita Dragoe
Journal of Materiomics, 2023
Synergistic Effect of Work Function and Acoustic Impedance Mismatch for Improved Thermoelectric Performance in GeTe-WC Composite
Ashutosh Kumar, Preeti Bhumla, Artur Kosonowski, Karol Wolski, Szczepan Zapotoczny, et al.
ACS Applied Materials and Interfaces, 2022
Effect of interface thermal resistance on thermoelectric properties of acoustically mismatched composite
Ashutosh Kumar, Krzysztof T. Wojciechowski
Journal of the European Ceramic Society, 2022
Origin of electrical contact resistance and its dominating effect on electrical conductivity in PbTe/CoSb3 composite
Artur Kosonowski, Ashutosh Kumar, Karol Wolski, Szczepan Zapotoczny, Krzysztof T. Wojciechowski
Journal of the European Ceramic Society, 2022
Improved thermoelectric properties in (1-x)LaCoO3/(x)La0.7Sr0.3CoO3 composite
Ashutosh Kumar, D. Sivaprahasam, Ajay D. Thakur
Materials Chemistry and Physics, 2021
Charge transport and resistive switching in a 2D hybrid interface
Karuna Kumari, Ashutosh Kumar, Ajay D Thakur, S.J. Ray
Materials Research Bulletin, 2021
Engineering Electronic Structure and Lattice Dynamics to Achieve Enhanced Thermoelectric Performance of Mn-Sb Co-Doped GeTe
Ashutosh Kumar, Preeti Bhumla, Taras Parashchuk, Stanislaw Baran, Saswata Bhattacharya, et al.
Chemistry of Materials, 2021
Colossal seebeck coefficient in Aurivillius phase-perovskite oxide composite
Ashutosh Kumar, D. Sivaprahasam, Ajay D. Thakur
Journal of Alloys and Compounds, 2021
Thermal conductivity of PbTe-CoSb3bulk polycrystalline composite: role of microstructure and interface thermal resistance
Artur Kosonowski, Ashutosh Kumar, Taras Parashchuk, Raul Cardoso-Gil, Krzysztof T. Wojciechowski
Dalton Transactions, 2021
Effective thermal conductivity of SrBi4Ti4O15-La0.7Sr0.3MnO3 oxide composite: Role of particle size and interface thermal resistance
Ashutosh Kumar, Artur Kosonowski, Piotr Wyzga, Krzysztof T. Wojciechowski
Journal of the European Ceramic Society, 2021
Bi2Se3-PVDF composite: A flexible thermoelectric system
Ashutosh Kumar, Ravi Kumar, Dillip K. Satapathy
Physica B Condensed Matter, 2020
Graphene mediated resistive switching and thermoelectric behavior in lanthanum cobaltate
Ashutosh Kumar, Karuna Kumari, S. J. Ray, Ajay D. Thakur
Journal of Applied Physics, 2020
Thermoelectric properties in spark plasma sintered La0.7Sr0.3Mn0.5Co0.5O3
Ashutosh Kumar, Karuna Kumari, D. Sivaprahasam, Ajay D. Thakur
Aip Conference Proceedings, 2020
Magnetic and thermoelectric properties of α-MnO2nanorods
Ashutosh Kumar, Karuna Kumari, C. V. Tomy, Ajay D. Thakur
Aip Conference Proceedings, 2020
Effect of temperature and magnetic field in resistive switching behavior of La0.7Ca0.3MnO3.rGO nano-composite
Karuna Kumari, Ashutosh Kumar, Ajay D. Thakur, S. J. Ray
Aip Conference Proceedings, 2020
Structural and resistive switching behaviour in lanthanum strontium manganite - Reduced graphene oxide nanocomposite system
Karuna Kumari, Ashutosh Kumar, Dinesh K. Kotnees, Jayakumar Balakrishnan, Ajay D. Thakur, et al.
Journal of Alloys and Compounds, 2020
Thermal conductivity of nanostructured Fe0.04Co0.96Sb3 skutterudite
D. Sivaprahasam, S.B. Chandrasekhar, S. Kashyap, Ashutosh Kumar, R. Gopalan
Materials Letters, 2019
Charge transport mechanism and thermoelectric behavior in Te:(PEDOT:PSS) polymer composites
Ashutosh Kumar, Manjusha Battabyal, Avnee Chauhan, G Suresh, R Gopalan, et al.
Materials Research Express, 2019
Thermoelectric Properties of (1 - X)LaCoO3.(x)La0.95Sr0.05CoO3 composite
Ashutosh Kumar, Karuna Kumari, B Jayachandran, D Sivaprahasam, Ajay D Thakur
Materials Research Express, 2019
Magnetothermopower, magnetoresistance and magnetothermal conductivity in La0.95Sr0.05Co1-xMnxO3 (0.00 ≤ x ≤ 1.00)
Ashutosh Kumar, C V Tomy, Ajay D Thakur
Materials Research Express, 2018
Thermoelectric properties of (1-x)LaCoO3.xLa0.7Sr0.3MnO3 composite
Ashutosh Kumar, Karuna Kumari, B. Jayachandran, D. Sivaprahasam, Ajay D. Thakur
Journal of Alloys and Compounds, 2018
SrBi4Ti4O15 Aurivillius phase thin films by pulsed laser deposition using Nd:YAG laser
Ashutosh Kumar, Ajay D. Thakur
Aip Conference Proceedings, 2018
Improvement of thermoelectric properties of lanthanum cobaltate by Sr and Mn co-substitution
Ashutosh Kumar, D. Sivaprahsam, Ajay D. Thakur
Journal of Alloys and Compounds, 2018
Magnetism in La0.7Sr0.3Mn1-xCoxO3 (0 ≤ x ≤ 1)
Ashutosh Kumar, Himanshu Sharma, C. V. Tomy, Ajay D. Thakur
Aip Conference Proceedings, 2016
Extreme sensitivity of magnetic properties on the synthesis routes in La0.7Sr0.3MnO3
Ashutosh Kumar, Himanshu Sharma, C. V. Tomy, Ajay D. Thakur
Aip Conference Proceedings, 2016

RECENT SCHOLAR PUBLICATIONS

Tailored Thermal and Mechanical Performance of Biodegradable PLA‐P (VDF‐TrFE) Polymer Blends
G Suresh, B Satyanarayna, C Thirmal, K Jagarlamudi, T Komala, ...
Journal of Applied Polymer Science, e70307 , 2026
2026
Citations: 1
Tuning functional properties of 3-D printed ferroelectric ceramics using different architectures
A Pramanick, C Babori, F Albertini, FH Gjørup, A Kumar, MRV Jørgensen, ...
Journal of the European Ceramic Society, 118025 , 2025
2025
Citations: 1
Magnetocaloric properties of Sb, Ge, and Ga doped AlFe2B2
R Preyadarshini, S Kavita, A Kumar, D Sivaprahasam
Journal of Magnetism and Magnetic Materials, 173693 , 2025
2025
Configurational Entropy-Driven Phase Stability and Thermal Transport in Rock-Salt High-Entropy Oxides
A Kumar, A Moll, J Kumar, D Dragoe, D Bérardan, N Dragoe
arXiv preprint arXiv:2510.09342 , 2025
2025
Nonlinearity and domain switching behavior in different architectures of 3D printed ferroelectric ceramics
A Pramanick, C Babori, F Albertini, FH Gjørup, A Kumar, MRV Jørgensen, ...
International Symposium on the Applications of Ferroelectrics , 2025
2025
Nonlinearity and Domain Switching in a 3D‐Printed Architected Ferroelectric
A Pramanick, C Babori, F Albertini, FH Gjørup, AB Oudot, A Kumar, ...
Advanced Engineering Materials 27 (10), 2402104 , 2025
2025
Citations: 1
Dopant-induced structural modifications and thermoelectric properties in Al 1.2 Fe 1.9 M 0.1 B₂ intermetallic borides (M = Ag, Ni, Sb, Ga, Ge)
D Sivaprahasam, R Preyadarshini, A Kumar
Applied Physics A 131 (4), 318 , 2025
2025
Citations: 3
Localized domain switching and tunable functional properties in 3D printed architected ferroelectric ceramics
A Pramanick, C Babori, F Albertini, FH Gjørup, A Kumar, L Daniel, ...
Electronic Materials and Applications , 2025
2025
Boosting Thermoelectric Performance in Nanocrystalline Ternary Skutterudite Thin Films through Metallic CoTe 2 Integration
B Jarwal, S Abbas, TL Chou, SM Vailyaveettil, A Kumar, S Quadir, TT Ho, ...
ACS Applied Materials & Interfaces 16 (12), 14770-14780 , 2024
2024
Citations: 2
Thermoelectric Properties of High‐Entropy Wolframite Oxide: (CoCuNiFeZn) 1− x Ga x WO 4
A Kumar, A Moll, MN Mouhamadsiradjoudine, F Brisset, D Berardan, ...
physica status solidi (RRL)–Rapid Research Letters 18 (3), 2300372 , 2024
2024
Citations: 8
The concept of the composite thermoelectric materials with attuned electronic structure and mismatched phonon structure (AES-MPS)
K Wojciechowski, A Kosonowski, A Kumar, T Parashchuk, A Lis, ...
Thermoelectrics , 2023
2023
Effect of crystal field engineering and Fermi level optimization on thermoelectric properties of : Experimental investigation and theoretical insight
A Kumar, P Bhumla, D Sivaprahasam, S Bhattacharya, N Dragoe
Physical Review Materials 7 (4), 045402 , 2023
2023
Citations: 10
Magnetic and electrical properties of high-entropy rare-earth manganites
A Kumar, D Bérardan, D Dragoe, E Riviere, T Takayama, H Takagi, ...
Materials Today Physics 32, 101026 , 2023
2023
Citations: 43
Novel entropy-stabilized fluorite oxides with multifunctional properties
A Kumar, D Bérardan, F Brisset, D Dragoe, N Dragoe
Journal of Materials Chemistry A 11 (26), 14320-14332 , 2023
2023
Citations: 29
Thermoelectric properties of high-entropy rare-earth cobaltates
A Kumar, D Dragoe, D Berardan, N Dragoe
Journal of Materiomics 9 (1), 191-196 , 2023
2023
Citations: 66
Thermoelectric properties of Sb doped AlFe B
D Sivaprahasam, A Kumar, B Jayachandran, R Gopalan
arXiv preprint arXiv:2212.01193 , 2022
2022
Citations: 1
Synergistic effect of work function and acoustic impedance mismatch for improved thermoelectric performance in GeTe-WC composite
A Kumar, P Bhumla, A Kosonowski, K Wolski, S Zapotoczny, ...
ACS applied materials & interfaces 14 (39), 44527-44538 , 2022
2022
Citations: 27
Effect of interface thermal resistance on thermoelectric properties of acoustically mismatched composite
A Kumar, KT Wojciechowski
Journal of the European Ceramic Society 42 (10), 4227-4232 , 2022
2022
Citations: 18
Decoupled atomic contribution boosted high thermoelectric performance in mixed cation spinel oxides ACo2O4
A Srivastava, M Mukherjee, AK Singh
Applied Physics Letters 120 (24) , 2022
2022
Citations: 13
Origin of electrical contact resistance and its dominating effect on electrical conductivity in PbTe/CoSb3 composite
A Kosonowski, A Kumar, K Wolski, S Zapotoczny, KT Wojciechowski
Journal of the European Ceramic Society 42 (6), 2844-2852 , 2022
2022
Citations: 8

MOST CITED SCHOLAR PUBLICATIONS

Thermoelectric properties of high-entropy rare-earth cobaltates
A Kumar, D Dragoe, D Berardan, N Dragoe
Journal of Materiomics 9 (1), 191-196 , 2023
2023
Citations: 66
Engineering electronic structure and lattice dynamics to achieve enhanced thermoelectric performance of Mn–Sb Co-doped GeTe
A Kumar, P Bhumla, T Parashchuk, S Baran, S Bhattacharya, ...
Chemistry of Materials 33 (10), 3611-3620 , 2021
2021
Citations: 49
Graphene mediated resistive switching and thermoelectric behavior in lanthanum cobaltate
A Kumar, K Kumari, SJ Ray, AD Thakur
Journal of Applied Physics 127 (23) , 2020
2020
Citations: 48
Magnetic and electrical properties of high-entropy rare-earth manganites
A Kumar, D Bérardan, D Dragoe, E Riviere, T Takayama, H Takagi, ...
Materials Today Physics 32, 101026 , 2023
2023
Citations: 43
Improvement of thermoelectric properties of lanthanum cobaltate by Sr and Mn co-substitution
A Kumar, D Sivaprahsam, AD Thakur
Journal of Alloys and Compounds 735, 1787-1791 , 2018
2018
Citations: 43
Structural and resistive switching behaviour in lanthanum strontium manganite-Reduced graphene oxide nanocomposite system
K Kumari, A Kumar, DK Kotnees, J Balakrishnan, AD Thakur, SJ Ray
Journal of Alloys and Compounds 815, 152213 , 2020
2020
Citations: 35
Thermoelectric properties of (1-x) LaCoO3. xLa0. 7Sr0. 3MnO3 composite
A Kumar, K Kumari, B Jayachandran, D Sivaprahasam, AD Thakur
Journal of Alloys and Compounds 749, 1092-1097 , 2018
2018
Citations: 35
Bi2Se3-PVDF composite: A flexible thermoelectric system
A Kumar, R Kumar, DK Satapathy
Physica B: Condensed Matter 593, 412275 , 2020
2020
Citations: 33
Novel entropy-stabilized fluorite oxides with multifunctional properties
A Kumar, D Bérardan, F Brisset, D Dragoe, N Dragoe
Journal of Materials Chemistry A 11 (26), 14320-14332 , 2023
2023
Citations: 29
Synergistic effect of work function and acoustic impedance mismatch for improved thermoelectric performance in GeTe-WC composite
A Kumar, P Bhumla, A Kosonowski, K Wolski, S Zapotoczny, ...
ACS applied materials & interfaces 14 (39), 44527-44538 , 2022
2022
Citations: 27
Charge transport and resistive switching in a 2D hybrid interface
K Kumari, A Kumar, AD Thakur, SJ Ray
Materials Research Bulletin 139, 111195 , 2021
2021
Citations: 25
Charge transport mechanism and thermoelectric behavior in Te:(PEDOT: PSS) polymer composites
A Kumar, M Battabyal, A Chauhan, G Suresh, R Gopalan, NV Ravi Kumar, ...
Materials Research Express 6 (11), 115302 , 2019
2019
Citations: 25
Effective thermal conductivity of SrBi4Ti4O15-La0. 7Sr0. 3MnO3 oxide composite: Role of particle size and interface thermal resistance
A Kumar, A Kosonowski, P Wyzga, KT Wojciechowski
Journal of the European Ceramic Society 41 (1), 451-458 , 2021
2021
Citations: 22
Thermoelectric Properties of (1 − x )LaCoO 3 .( x )La 0.95 Sr 0.05 CoO 3 composite
A Kumar, K Kumari, B Jayachandran, D Sivaprahasam, AD Thakur
Materials Research Express 6 (5), 055502 , 2019
2019
Citations: 22
Thermal conductivity of PbTe–CoSb 3 bulk polycrystalline composite: role of microstructure and interface thermal resistance
A Kosonowski, A Kumar, T Parashchuk, R Cardoso-Gil, KT Wojciechowski
Dalton Transactions 50 (4), 1261-1273 , 2021
2021
Citations: 19
Effect of interface thermal resistance on thermoelectric properties of acoustically mismatched composite
A Kumar, KT Wojciechowski
Journal of the European Ceramic Society 42 (10), 4227-4232 , 2022
2022
Citations: 18
Thermal conductivity of nanostructured Fe0. 04Co0. 96Sb3 skutterudite
D Sivaprahasam, SB Chandrasekhar, S Kashyap, A Kumar, R Gopalan
Materials Letters 252, 231-234 , 2019
2019
Citations: 18
Magnetothermopower, magnetoresistance and magnetothermal conductivity in La 0.95 Sr 0.05 Co 1− x Mn x O 3 (0.00 ≤ x ≤ 1.00)
A Kumar, CV Tomy, AD Thakur
Materials Research Express 5 (8), 086110 , 2018
2018
Citations: 16
Decoupled atomic contribution boosted high thermoelectric performance in mixed cation spinel oxides ACo2O4
A Srivastava, M Mukherjee, AK Singh
Applied Physics Letters 120 (24) , 2022
2022
Citations: 13
Improved thermoelectric properties in (1-x) LaCoO3/(x) La0. 7Sr0. 3CoO3 composite
A Kumar, D Sivaprahasam, AD Thakur
Materials Chemistry and Physics 269, 124750 , 2021
2021
Citations: 13

Ashutosh Kumar

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Scopus Publications

RECENT SCHOLAR PUBLICATIONS

MOST CITED SCHOLAR PUBLICATIONS