DataVXACS Applied Electronic MaterialsPaper
journal article·2021-02-23

B-Site Stoichiometry Control of the Magnetotransport Properties of Epitaxial Sr2FeMoO6 Thin Film

Nand Kumar, Raveena Gupta, Ripudaman Kaur, Daichi Oka, Sonali Kakkar, Sanjeev Kumar, Surendra Singh, Tomoteru Fukumura, Chandan Bera, Suvankar Chakraverty

ACS Applied Electronic Materials· Volume 3· Issue 2
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Source abstract

Abstract

The high degree of spin-polarization observed in ordered double perovskite oxide Sr2FeMoO6 at room temperature has attracted considerable interest from both fundamental and practical points of view. In this paper, we have shown a significant change in spin-polarization with a small B-site off-stoichiometry. We have demonstrated a direct correlation between the growth process, Fe:Mo (B-site) stoichiometry, and the electrical properties of half metallic Sr2FeMoO6 thin film. We have shown that varying the Fe:Mo (B-site) stoichiometry by a small atomic percent results in an order of magnitude change in resistivity and at least four times change in magnetoresistance. Theoretical calculation suggests a strong correlation between electronic structure, electronic polarization, and B-site non-stoichiometry.
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Research context

Electronic materials

OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Advanced Condensed Matter Physics · Electronic and Structural Properties of Oxides

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Quantum Materials and Devices Unit, Institute of Nano Science and Technology, Knowledge City, Sector-81, S.A.S Nagar, Mohali, Punjab 140306, India

Applied Science Department, Punjab Engineering College (Deemed to be University), Sector- 12, Chandigarh 160012, India

Centre for Nanoscience and Nanotechnology, Panjab University, Sector-25, Chandigarh 160036, India

Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan

Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India

Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India

Advanced Institute for Materials Research and Core Research Cluster, Tohoku University, Sendai 980-8577, Japan

Funding

Department of Atomic Energy, Government of India

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