TY - JOUR
T1 - B-Site Stoichiometry Control of the Magnetotransport Properties of Epitaxial Sr2FeMoO6 Thin Film
AU - Kumar, Nand
AU - Gupta, Raveena
AU - Kaur, Ripudaman
AU - Oka, Daichi
AU - Kakkar, Sonali
AU - Kumar, Sanjeev
AU - Singh, Surendra
AU - Fukumura, Tomoteru
AU - Bera, Chandan
AU - Chakraverty, Suvankar
N1 - Funding Information:
The authors acknowledge financial support from BRNS-DAE project number 58/14/2019-BRNS/1056.
Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/2/23
Y1 - 2021/2/23
N2 - 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.
AB - 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.
KW - double perovskite
KW - electrical and magnetic properties
KW - half metal
KW - spin polarization
KW - stoichiometry
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U2 - 10.1021/acsaelm.0c00933
DO - 10.1021/acsaelm.0c00933
M3 - Article
AN - SCOPUS:85101750661
VL - 3
SP - 597
EP - 604
JO - ACS Applied Electronic Materials
JF - ACS Applied Electronic Materials
SN - 2637-6113
IS - 2
ER -