Manvendra Singh Khatri
@nituk.ac.in
Assistant Professor, Department of Physics
NIT Uttarakhand
Manvendra Singh Khatri is currently working as an Assistant Professor (Grade-I) in the Department of Physics. Before joining to NITUK, he has worked as Assistant Professor at NIT Hamirpur and Kurukshetra University, Kurukshetra, respectively. He received B.Sc. and M. Sc. from H. N. B. Garhwal University, Srinagar (Garhwal) in the year 1998 and 2000, respectively. He obtained his Ph.D. in Physics from the Technical University, Dresden, Germany in the year 2010. He has also worked as a postdoctoral fellow in the Department of Physics, National Taiwan University, Taipei, Taiwan during 2010-2011. His research interests include electrodeposition of thin films, nanowires, multilayers and composite materials.
RESEARCH INTERESTS
Thin films, Nanowires, Multilayers, Composite Materials
Scopus Publications
Scopus Publications
Himanshu Saini, Sunil Gangwar, C. S. Yadav, and M. S. Khatri
Pleiades Publishing Ltd
Himanshu Saini, Sunil Gangwar, C S Yadav, and M S Khatri
IOP Publishing
Abstract Cu-Ni films are electrodeposited at a cathodic current of 10 mA via galvanostatic mode on ITO-coated glass substrates. It found by X-ray diffraction that the films crystalized into fcc structure with the highest intensity corresponding to (111) plane at a two-theta value of 43°. The presence of binding energy peaks at 856.57 eV, 861 eV, 933 eV, and 952 eV observed in X-ray photoelectron spectroscopy have confirmed the presence of nickel oxide/hydroxide and copper oxide/hydroxide, respectively. Tafel polarization studies conducted in 3.5 wt. % sodium chloride solution shows the shifts in Ecorr towards the positive side and decrease of Icorr with the passage of exposure time is attributed to the formation of protective oxides/hydroxides layers of Cu and Ni elements in the films.
Sunil Singh Negi, Pankaj Singh Rana, Nitin Sharma, and Manvendra Singh Khatri
Springer Science and Business Media LLC
Shivani Agarwal and Manvendra Singh Khatri
Springer Science and Business Media LLC
Shivani Agarwal, Ravi Prakash Singh, and Manvendra Singh Khatri
Springer Science and Business Media LLC
Shivani Agarwal, Diana Pohl, Ajit Kumar Patra, Kornelius Nielsch, and Manvendra Singh Khatri
Elsevier BV
Shivani Agarwal, Ravi Prakash Singh, and Manvendra Singh Khatri
Springer Science and Business Media LLC
Shivani Agarwal, S.A. Hashmi, Bhanu Nandan, Ajit Kumar Patra, Ravi Prakash Singh, J. Arout Chelvane, and Manvendra Singh Khatri
Elsevier BV
Manvendra Singh Khatri, Shivani Agarwal, Jen-Hwa Hsu, Chia-Hua Chien, Cheng-Lung Chen, and Yang-Yuan Chen
Author(s)
Highly ordered CoxPt1-x (x ≤ 0.82) magnetic nanowire arrays of 60 nm diameter have been fabricated successfully by electrodeposition process into the pores of anodic aluminum oxide (AAO) templates. Electrodeposition process has been used as it is one of the simplest and most inexpensive, easily controlled method for the synthesis of nanowires.It was found that deposition potential is a key factor to control the composition and thus the magnetic properties of the nanowires. The as-deposited CoxPt1-x nanowires were characterized by XRD to have fcc structure with preferred orientation of (111) or (001) along the nanowire. Co-rich nanowires exhibit ferromagnetic behavior in contrast to near superparamagnetic response of the Pt-rich nanowires. Upon annealing the effects of crystallization cause the decrease of anisotropy along the wire axis for Co82Pt18 nanowires due to the increase of magnetocrystalline anisotropy perpendicular to the wire axis. In the next phase of our work segmented CoPtP/Pt multilayers nan...
M. S. Khatri, H. Schlörb, S. Fähler, and L. Schultz
AIP
Co-rich Co-Pt films have been electrodeposited on Si (100) substrates with a 30 nm thick Cr buffer and a 10 nm Au conducting layer. Films have been deposited on different days after preparing the electrolyte, at current density of 28 mA/cm2, keeping all other deposition parameters constant. It has been observed from pole figures and magnetic measurements that the age of electrolyte has a significant effect on phase formation and magnetic properties of Co-Pt films. This instability in the deposition process with the age of the electrolyte is attributed to the anodic oxidation of ammonia and citrate in the presence of Co2+ ions, which has a significant influence on the deposition of cobalt based alloys. The reduction of Co2+ can be modify by two ways. First, it is possible that the nature of the complexation of Co2+ is changed because of a decomposition of ammonium citrate and formation of new compounds. Secondly, the new molecules formed in the anodic reaction may decrease the rate of reduction of Co2+ by ...
M. S. Khatri, H. Schlörb, S. Fähler, and L. Schultz
Wiley
Co‐rich Co–Pt alloy films have been grown by electrodeposition on Au buffer layer. Detailed texture measurements have been performed in order to understand the dependence of magnetic properties on phase composition and texture. X‐ray analysis in Bragg–Brentano geometry shows that films seem to consist of hexagonal closed packed (hcp) or fcc phase. Due to similar lattice spacing of the densely packed planes of both possible phases, the (111) fcc and (002) hcp planes of Co–Pt and also the higher order reflections coincide. As a result, the information supplied by X‐ray diffraction was of limited value. Hence pole figure measurements are used which determine the directional distribution of planes with a selected spacing. Here we present an approach to use pole figure measurements for phase identification. We show that this method allow a direct correlation with the magnetic properties, in particular with the magnetocrystalline anisotropy and magnetic texture.
Heike Schlörb, Veronika Haehnel, Manvendra Singh Khatri, Ajeet Srivastav, Amit Kumar, Ludwig Schultz, and Sebastian Fähler
Wiley
Magnetic nanowire arrays allow studying magnetism at the nanoscale and have broad application areas. Here we review our recent experiments on tailoring the structure and microstructure of electrochemically grown elemental (Fe, Ni, Co) and alloy (Co–Pt) magnetic nanowires. The comparison of these different materials allows identifying the role of shape, magnetocrystalline and magnetoelastic anisotropies as well as magnetostatic interactions.
M.S. Khatri, H. Schlörb, S. Fähler, L. Schultz, B. Nandan, M. Böhme, R. Krenek, and M. Stamm
Elsevier BV
C. Müller, M. S. Khatri, C. Deneke, S. Fähler, Y. F. Mei, E. Bermúdez Ureña, and O. G. Schmidt
AIP Publishing
Au/Co/Au trilayers are fabricated by tilted deposition on prestructured polymer sacrificial layers. The metal trilayers are released by selectively dissolving the sacrificial layer and roll-up into microtubes. Magnetization properties are strongly affected by the roll-up process. In addition to a modified shape anisotropy, the magnetostrictive anisotropy due to the anisotropic stress release is reversed. Low temperature measurements support the presence of significant exchange bias in these rolled-up structures.
Ch Deneke, J Schumann, R Engelhard, J Thomas, C Müller, M S Khatri, A Malachias, M Weisser, T H Metzger, and O G Schmidt
IOP Publishing
The structure and magnetic properties of an InGaAs/Fe3Si superlattice in a cylindrical geometry are investigated by electron microscopy techniques, x-ray diffraction and magnetometry. To form a radial superlattice, a pseudomorphic InGaAs/Fe3Si bilayer has been released from its substrate self-forming into rolled-up microtubes. Oxide-free interfaces as well as areas of crystalline bonding are observed and an overall lattice mismatch between succeeding layers is determined. The cylindrical symmetry of the final radial superlattice shows a significant effect on the magnetization behavior of the rolled-up layers.