D. Bhattacharyya

Bhabha Atomic Research Centre

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S. N. Jha

University of California, Los Angeles

126

Ashok K. Yadav

Jain University

S. N. Jha

Bhabha Atomic Research Centre

N. K. Sahoo

Berhampur University

Chandrani Nayak

Bhabha Atomic Research Centre

Parasmani Rajput

Homi Bhabha National Institute

S. Maidul Haque

Central Glass and Ceramic Research Institute

Nipanjana Patra

University of California, Berkeley

Prasanta K. Mohapatra

Bhabha Atomic Research Centre

Ravi Kumar

Bhabha Atomic Research Centre

Cooperative Institutions

Bhabha Atomic Research Centre

262

Homi Bhabha National Institute

178

Bhabha Atomic Research Center Hospital

102

University of Mumbai

Raja Ramanna Centre for Advanced Technology

UGC DAE Consortium for Scientific Research

Indian Institute of Technology Bombay

Hanover College

Banaras Hindu University

Devi Ahilya Vishwavidyalaya

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Insights into local atomic structure of Fe alloyed ZnS nano crystals: Correlation with structural, optical, magnetic and photocatalyst properties

Journal of Alloys and Compounds (2019)

Soumendra Ghorai Nirmalendu Patra Arkadeb Pal D. Bhattacharyya S. N. Jha

Rietveld Refinement

10.1016/j.jallcom.2019.06.357

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Citations (17)

Unraveling the impact of nonmagnetic Sc substitution on the magnetic properties of La₂NiMnO₆ double perovskite

Physica Scripta (2021)

Mohammad Nasir Mahmud Khan Subhash Bhatt Nirmalendu Patra D. Bhattacharyya

Abstract The structural, electronic, and magnetic properties of a sol-gel prepared series of La 2 Ni 1− x Sc x MnO 6 compounds have been extensively studied using x-ray diffraction, x-ray absorption near edge structure, and dc magnetization techniques, respectively. The entire series was isostructural and exhibited the La 2 NiMnO 6 double perovskite P2 1 /n monoclinic structure. The nonmagnetic Sc 3+ substitution led to the evolution of competing magnetic phases in La 2 Ni 1− x Sc x MnO 6 . The substitution also caused an increase in lattice parameters, cell volume, and bond lengths. Consequently, Sc 3+ dilution resulted in a dramatic decrease in Curie temperature, suggesting a reduction in the strength of the Ni 2+ –O 2− –Mn 4+ superexchange ferromagnetic interaction. The Sc 3+ substitution generated antisite defects, which significantly suppressed the saturation magnetization of the system. The competing magnetic interactions observed in the La 2 Ni 1− x Sc x MnO 6 system are discussed in terms of cation disorder, cation valances, and changes in the bond lengths/angles, caused by the Sc 3+ substitution.

Superexchange

Isostructural

Molecular geometry

Monoclinic crystal system

10.1088/1402-4896/abdf84

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Citations (7)

CoFeVSb: A Promising Candidate for Spin Valve and Thermoelectric Applications

arXiv (Cornell University) (2021)

Jadupati Nag Deepika Rani Durgesh Singh R. Venkatesh Bhawna Sahni

We report a combined theoretical and experimental study of a novel quaternary Heusler system CoFeVSb from the view point of room temperature spintronics and thermoelectric applications. It crystallizes in cubic structure with small DO$_3$-type disorder. The presence of disorder is confirmed by room temperature synchrotron X-ray diffraction(XRD) and extended X-ray absorption fine structure (EXAFS) measurements. Magnetization data reveal high ordering temperature with a saturation magnetization of 2.2 $\mu_B$/f.u. Resistivity measurements reflect half-metallic nature. Double hysteresis loop along with asymmetry in the magnetoresistance(MR) data reveals room temperature spin-valve feature, which remains stable even at 300 K. Hall measurements show anomalous behavior with significant contribution from intrinsic Berry phase. This compound also large room temperature power factor ($\sim0.62$ mWatt/m/K$^{2}$) and ultra low lattice thermal conductivity ($\sim0.4$ W/m/K), making it a promising candidate for thermoelectric application. Ab-initio calculations suggest weak half-metallic behavior and reduced magnetization (in agreement with experiment) in presence of DO$_3$ disorder. We have also found an energetically competing ferromagnetic FM)/antiferromagnetic (AFM) interface structure within an otherwise FM matrix: one of the prerequisites for spin valve behavior. Coexistence of so many promising features in a single system is rare, and hence CoFeVSb gives a fertile platform to explore numerous applications in future.

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Influence of Li co-doping on structural property of sol-gel derived terbium doped zinc oxide nanoparticles

Materials Characterization (2018)

Pawan Kumar Ashok K. Yadav Amish G. Joshi D. Bhattacharyya S. N. Jha

Terbium

XANES

10.1016/j.matchar.2018.06.024

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Citations (47)

Probing local structure of co doped polyvinylidene fluoride-ZnO thin films using X-ray absorption spectroscopy

Spectrochimica Acta Part B Atomic Spectroscopy (2017)

Rajkumar Dey Ashok K. Yadav Ritamay Bhunia S. N. Jha D. Bhattacharyya

XANES

Nanocrystalline material

Wurtzite crystal structure

Polyvinylidene fluoride

X-ray absorption spectroscopy

10.1016/j.sab.2017.03.018

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Citations (5)

CoMnCrGa: a novel ferromagnetic material with high spin-polarization for room temperature spintronics

Journal of Materials Chemistry C (2023)

Shuvankar Gupta Sudip Chakraborty Vidha Bhasin Santanu Pakhira Shovan Dan

Here, we report the synthesis of a novel quaternary Heusler alloy CoMnCrGa and its structural, magnetic, transport and electronic properties using both experimental and theoretical methods.

10.1039/d3tc02813e

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Citations (2)

Correction: Effect of ionic size compensation by Ag⁺ incorporation in homogeneous Fe-substituted ZnO: studies on structural, mechanical, optical, and magnetic properties

RSC Advances (2018)

Gaurav Bajpai Tulika Srivastava Nipanjana Patra Igamcha Moirangthem S. N. Jha

[This corrects the article DOI: 10.1039/C8RA02393J.].

10.1039/c8ra90069h

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Citations (1)

Structural, optical and vacancies investigations of Li-doped ZnO

Journal of Nanoparticle Research (2022)

Parasmani Rajput M. Senthil Kumar Rucha S. Joshi Prashant Singh Mangla Nand

Wurtzite crystal structure

10.1007/s11051-022-05539-8

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Citations (4)

Al5BO9:Tb3+: Synthesis, structural characterization and thermoluminescence dosimetry studies for high intensity thermal neutron beams

Ceramics International (2023)

Meghnath Sen Rakesh Shukla Nimai Pathak Vidha Bhasin Sambhu Nath Jha

Radioluminescence

Nanocrystalline material

10.1016/j.ceramint.2023.08.051

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Citations (3)

Local structure surrounding V sites in Co doped ZnV2O4

arXiv (Cornell University) (2015)

Prashant Shahi Neelam Tiwari D. Bhattacharyya S. N. Jha A. Ghosh

Co doped ZnV2O4 has been investigated by Synchrotron X-ray diffraction, Magnetization measurement and Extended X-ray absorption fine structure (EXAFS) analysis. With Co doping in the Zn site the system moves towards the itinerant electron limit. From Synchrotron and magnetization measurement it is observed that there is an effect in bond lengths and lattice parameters around the magnetic transition temperature. The EXAFS study indicates that Co ion exists in the High spin state in Co doped ZnV2O4.

X-ray absorption spectroscopy

10.48550/arxiv.1504.01232

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