Faculty Profiles - Jha Alok Kumar

Jha Alok Kumar

Scopus Paper Info

Total Paper Count: 0 Total Citation Count: 0 h-index: 8

Citation count denotes the number of citations in papers published for a particular year.

Affiliation

Faculty of Engineering Department of Materials Science

Job

Assistant Professor

External link

Degree

Indian Institute of Technology Delhi - Doctor of Science 2012.07

Biography in Kyutech

2017.02

Kyushu Institute of Technology Faculty of Engineering Department of Materials Science Assistant Professor

Papers

Flux pinning characteristics of YBCO: NaNbO<inf>3</inf> by introducing artificial pinning centers with different morphology Reviewed International journal

Dahiya M., Kumar R., Kumar D., Jha A.K., Khare N.

Ceramics International ( Elsevier ) 2021.01

　More details

Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.ceramint.2021.08.328

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85114150710&origin=inward
Width dependence of the 0.5 × (2e<sup>2</sup>/h) conductance plateau in InAs quantum point contacts in presence of lateral spin-orbit coupling Reviewed International journal

Das P., Cahay M., Kalita S., Mal S., Jha A.

Scientific Reports ( Nature Publishing Group ) 9 ( 1 ) 2019.12

　More details

Language：English Publishing type：Research paper (scientific journal)

The evolution of the 0.5Go (Go = 2e2/h) conductance plateau and the accompanying hysteresis loop in a series of asymmetrically biased InAs based quantum point contacts (QPCs) in the presence of lateral spin-orbit coupling (LSOC) is studied using a number of QPCs with varying lithographic channel width but fixed channel length. It is found that the size of the hysteresis loops is larger for QPCs of smaller aspect ratio (QPC channel width/length) and gradually disappears as their aspect ratio increases. The physical mechanisms responsible for a decrease in size of the hysteresis loops for QPCs with increasing aspect ratio are: (1) multimode transport in QPCs with larger channel width leading to spin-flip scattering events due to both remote impurities in the doping layer of the heterostructure and surface roughness and impurity (dangling bond) scattering on the sidewalls of the narrow portion of the QPC, and (2) an increase in carrier density resulting in a screening of the electron-electron interactions in the QPC channel. Both effects lead to a progressive disappearance of the net spin polarization in the QPC channel and an accompanying reduction in the size of the hysteresis loops as the lithographic width of the QPC channel increases.

DOI： 10.1038/s41598-019-48380-1

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85071136736&origin=inward
Superconductive REBCO thin films and their nanocomposites: The role of rare-earth oxides in promoting sustainable energy Invited Reviewed International journal

7 ( 7 ) 82-1 - 82-21 2019.01

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.3389/fphy.2019.00082

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85068502310&origin=inward
Temperature dependence of critical currents in REBCO thin films with artificial pinning centers Reviewed International journal

30 ( 10 ) 2017.09

　More details

Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1088/1361-6668/aa835b

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85032836686&origin=inward
Isotropic enhancement in the critical current density of YBCO thin films incorporating nanoscale Y<inf>2</inf>BaCuO<inf>5</inf>inclusions Reviewed International journal

122 ( 9 ) 2017.09

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1063/1.5001273

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85029148908&origin=inward
Nanostructured Oxide Thin Films for Sustainable Development Reviewed International journal

171 201 - 206 2017.01

　More details

Language：English Publishing type：Research paper (international conference proceedings)

DOI： 10.1016/j.proeng.2017.01.327

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85014510695&origin=inward
Effect of simultaneous addition of 1D and 3D artificial pinning centers in hybrid YBa<inf>2</inf>Cu<inf>3</inf>O<inf>7-x</inf>multilayers Reviewed International journal

9 ( 6 ) 1042 - 1050 2017.01

　More details

Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1166/sam.2017.2848

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85017447634&origin=inward
Controlling the Critical Current Anisotropy of YBCO Superconducting Films by Incorporating Hybrid Artificial Pinning Centers Reviewed International journal

26 ( 3 ) 2016.04

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1109/TASC.2016.2525989

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84963606490&origin=inward
Critical Current Properties in Longitudinal Magnetic Field of YBCO Superconductor with APC Reviewed International journal

81 117 - 120 2016.01

　More details

Language：English Publishing type：Research paper (international conference proceedings)

DOI： 10.1016/j.phpro.2016.04.012

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84994651551&origin=inward
Tailoring the vortex pinning strength of YBCO thin films by systematic incorporation of hybrid artificial pinning centers Reviewed International journal

28 ( 11 ) 2015.10

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1088/0953-2048/28/11/114004

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84945562518&origin=inward
Irreversibility fields and critical current densities in strongly pinned YBa<inf>2</inf>Cu<inf>3</inf>O<inf>7-x</inf> films with artificial pinning centers Reviewed International journal

25 ( 3 ) 2015.06

　More details

Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1109/TASC.2015.2396358

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84927165564&origin=inward
Systematic variation of hybrid APCs into YBCO thin films for improving the vortex pinning properties Reviewed International journal

25 ( 3 ) 2015.06

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1109/TASC.2014.2380817

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84923915181&origin=inward
Tuning the microstructure and vortex pinning properties of YBCO-based superconducting nanocomposite films by controlling the target rotation speed Reviewed International journal

27 ( 2 ) 2014.02

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1088/0953-2048/27/2/025009

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84892596961&origin=inward
Influence of interfacial LSMO nanoparticles/layer on the vortex pinning properties of YBCO thin film Reviewed International journal

27 ( 4 ) 1021 - 1026 2014.01

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1007/s10948-013-2384-0

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84899459611&origin=inward
Comparison of flux pinning mechanism in laser ablated YBCO and YBCO:BaZrO 3 nanocomposite thin films Reviewed International journal

25 ( 2 ) 377 - 380 2012.02

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1007/s10948-011-1321-3

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84860339083&origin=inward
Interface engineering using ferromagnetic nanoparticles for enhancing pinning in YBa <inf>2</inf>Cu <inf>3</inf>O <inf>7-δ</inf> thin film Reviewed International journal

Alok K. Jha, Neeraj Khare and R. Pinto

110 ( 11 ) 2011.12

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1063/1.3665874

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84859353730&origin=inward
Enhanced critical current density in YBa2Cu3O 7-δ thin film deposited on La0.67Sr 0.33MnO3 decorated SrTiO3 substrates Reviewed International journal

Alok K. Jha, Neeraj Khare and R. Pinto

471 ( 21-22 ) 1154 - 1157 2011.11

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.physc.2011.05.147

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=80055004962&origin=inward
Enhanced flux pinning in pulsed laser deposited y Ba2Cu 3O7-δ: BaTiO3 nanocomposite thin films Reviewed International journal

Alok K. Jha, Neeraj Khare and R. Pinto

151 ( 20 ) 1447 - 1451 2011.10

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.ssc.2011.07.004

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=80052268467&origin=inward
Enhanced flux pinning in laser ablated YBCO:BaTiO3 nanocomposite thin film Reviewed International journal

Alok K. Jha, Neeraj Khare and R. Pinto

1349 ( PART A ) 919 - 920 2011.09

　More details

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

India Manipal University, Manipal, India 2010.12.26 - 2010.12.30

DOI： 10.1063/1.3606158

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=80052507125&origin=inward
Investigation of flux pinning properties of YBCO:BaZrO<inf>3</inf> composite superconductor from temperature dependent magnetization studies Reviewed International journal

Alok K. Jha and Neeraj Khare

322 ( 18 ) 2653 - 2657 2010.09

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.jmmm.2010.04.002

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77954219202&origin=inward
Strongly enhanced pinning force density in YBCO:BaTiO3 nanocomposite superconductor Reviewed International journal

Alok K. Jha and Neeraj Khare

( 469 ) 810 - 813 2009.07

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.physc.2009.05.008
Single crystalline superconducting MgB2 nanowires Reviewed International journal

( 22 ) 075017-1 - 075017-3 2009.06

　More details

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1088/0953-2048/22/7/075017

▼display all

Publications (Books)

Surfaces and Interfaces of Metal Oxide Thin Films, Multilayers, Nanoparticles and Nano-composites

Alok K. Jha and Kaname Matsumoto（Joint author）

Springer Nature 2021.06 （ ISBN:978-3-030-74072-6 ）

　More details

Language：English
Superconductivity: From Materials Science to Practical Applications

P. Mele, K. Prassides, C. Tarantini, A. Palau, P. Badica, A. K. Jha, T. Endo（Joint author）

Springer Nature 2019.08 （ ISBN:978-3-030-23302-0 ）

　More details

Language：English
Control of Vortex Pinning in YBCO Thin Films by Incorporating APCs Through Surface Modified Target Approach

Alok K. Jha and Kaname Matsumoto（Joint author , 53-73）

Springer Nature 2019.08 （ ISBN:978-3-030-23302-0 ）

　More details

Total pages：369 Language：English

Conference Prsentations (Oral, Poster)

Vortex pinning and critical current densities in GdBCO thin films with CaHfO3 nanoinclusions

Alok K. Jha

East Asia Symposium on Superconductor Electronics (EASSE) 2023 Yamagata University and Okayama University

　More details

Event date： 2023.03.27 - 2023.03.29 Language：English Country：Japan

We have studied the incorporation of CaHfO3 nanoinclusions inside GdBCO superconducting film matrix and subsequently the vortex pinning properties of the nanocomposite films. In this paper, the structural, microstructural and transport properties of GdBCO thin films incorporating varying concentrations of CaHfO3 are discussed.

Other Link： https://www.okayama-u.ac.jp/user/eng_aemt/EASSE2023/index.html
Search for superconductivity in Ir doped LSMO thin films

Alok K. Jha

70th JSAP Spring Meeting 2023.03 Japan Society of Applied Physics

　More details

Event date： 2023.03.15 - 2023.03.18 Language：English Country：Japan

In this study, we report the fabrication of Ir doped LSMO thin films on single crystal SrTiO3 and LSAT substrates using pulsed laser deposition technique and their structural, microstructural and electrical characterization.

Other Link： https://meeting.jsap.or.jp/english/program
Observation of superconducting transition in MTO/STO heteroepitaxial multilayer films

Alok K. Jha

70th JSAP Spring Meeting 2023.03 Japan Society of Applied Physics

　More details

Event date： 2023.03.15 - 2023.03.18 Language：English Country：Japan

In this study, the multilayer structures of spinel-type oxides containing transition metals are investigated. We studied the electrical transport properties of spinel MgTi2O4/SrTiO3 multilayer thin films with varying layer thickness and observed the appearance of superconducting transition with varying onset temperatures depending upon the layer thickness.

Other Link： https://meeting.jsap.or.jp/english/program
Vortex pinning and critical current densities in superconducting REBCO thin films with different nanoscale inclusions Invited

Alok K. Jha

International Conference on Advanced Materials and Nanotechnology (ICAMN) 2022 2022.12 Jaypee Institute of Information Technology, INDIA

　More details

Event date： 2022.12.22 - 2022.12.24 Language：English Country：India

The role of different geometries of the artificial pinning centers in pinning the quantized vortices are discussed. Accordingly, their influence on critical current densities of the REBCO thin films are presented.

Other Link： http://www.icamn.in/
Pinning of quantized vortices in superconducting YBCO thin films with different artificial pinning centers Invited

Alok K. Jha

Research Seminar Series, Ahmedabad University 2022.08 School of Arts and Science, Ahmedabad University, India

　More details

Event date： 2022.08.24 Language：English Country：India

In this talk, the developments in improving the superconducting parameters of YBCO over the years were presented. In addition, the structural, microstructural and transport properties of YBCO thin films incorporating different artificial pinning centers were also presented. The evaluation of temperature dependent vortex pinning properties due to various artificial pinning centers have also been discussed.

Other Link： https://ahduni.edu.in/academics/schools-centres/school-of-arts-and-sciences/
Pinning of quantized vortices in GdBCO thin films by BaHfO3 and CaHfO3 nanoinclusions: a comparative study

Alok K. Jha

69th JSAP Spring Meeting 2022.03 Japan Society of Applied Physics

　More details

Event date： 2022.03.22 - 2022.03.26 Language：English Country：Japan

We have investigated the incorporation of BaHfO3 and CaHfO3 nanoinclusions in GdBCO superconducting films and subsequently the vortex pinning properties of the nanocomposite films. In this presentation, the comparison was drawn between GdBCO films with BaHfO3 and CaHfO3 nanostructures.

Other Link： https://meeting.jsap.or.jp/jsap2022s/english
Evolution of REBCO thin films and their role in promoting sustainable energy Invited

Alok K. Jha

Global Research Efforts on Energy and Nanomaterials (GREEN) 2021 2021.12 Asia Pacific Society for Materials Research

　More details

Event date： 2021.12.17 - 2021.12.19 Language：English Country：China

In this talk, the developments in improving the superconducting parameters of REBCO over the years were presented. In addition, the reduction and control of critical current anisotropy of REBCO thin films through
APC technology have also been addressed.

Other Link： https://www.apsmr.org/green-2021/
Critical current densities in GdBCO thin films with CaHfO3 nanoinclusions

Alok K. Jha

The 34th International Symposium on Superconductivity (ISS 2021) 2021.12 AIST, Japan

　More details

Event date： 2021.11.30 - 2021.12.02 Language：English Country：Japan

We have studied the incorporation of CaHfO3 nanoinclusions inside GdBCO superconducting film matrix and subsequently the vortex pinning properties of the nanocomposite films. In this paper, the structural, microstructural and transport properties of GdBCO thin films incorporating varying concentrations of CaHfO3 have been discussed.

Other Link： https://iss2021wlg.jp

▼display all