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

被引：6

作者：

Kumar, Nand ^{[1
,2
]}

Gupta, Raveena ^{[1
,3
]}

Kaur, Ripudaman ^{[1
,2
]}

Oka, Daichi ^{[4
]}

Kakkar, Sonali ^{[1
]}

Kumar, Sanjeev ^{[2
]}

Singh, Surendra ^{[5
,6
]}

Fukumura, Tomoteru ^{[4
,7
,8
]}

Bera, Chandan ^{[1
]}

Chakraverty, Suvankar ^{[1
]}

机构：

[1] Inst Nano Sci & Technol, Quantum Mat & Devices Unit, Mohali 140306, Punjab, India

[2] Deemed Univ, Appl Sci Dept, Punjab Engn Coll, Chandigarh 160012, India

[3] Panjab Univ, Ctr Nanosci & Nanotechnol, Chandigarh 160036, India

[4] Tohoku Univ, Grad Sch Sci, Dept Chem, Sendai, Miyagi 9808578, Japan

[5] Bhabha Atom Res Ctr, Solid State Phys Div, Mumbai 400085, Maharashtra, India

[6] Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, India

[7] Tohoku Univ, Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

[8] Tohoku Univ, Core Res Cluster, Sendai, Miyagi 9808577, Japan

来源：

ACS APPLIED ELECTRONIC MATERIALS | 2021年 / 3卷 / 02期

关键词：

half metal; double perovskite; stoichiometry; spin polarization; electrical and magnetic properties; DOUBLE-PEROVSKITE SR2FEMOO6; LOW-FIELD MAGNETORESISTANCE; INTERGRAIN MAGNETORESISTANCE; OXIDE; MAGNETIZATION; DISORDER;

D O I：

10.1021/acsaelm.0c00933

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：597 / 604

页数：8

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