Detecting antiferromagnetism in tetragonal Cr2O3 by electrical measurements

被引：13

作者：

Asa, M. ^{[1
]}

Autieri, C. ^{[2
]}

Barone, C. ^{[3
,4
]}

Mauro, C. ^{[3
,4
]}

Picozzi, S. ^{[5
]}

Pagano, S. ^{[3
,4
]}

Cantoni, M. ^{[1
]}

机构：

[1] Politecn Milan, Dipartimento Fis, Via G Colombo 81, I-20133 Milan, Italy

[2] Polish Acad Sci, Int Res Ctr MagTop, Inst Phys, Aleja Lotnikow 32-46, PL-02668 Warsaw, Poland

[3] Univ Salerno, Dipartimento Fis ER Caianiello, I-84084 Salerno, Italy

[4] Univ Salerno, CNR SPIN Salerno, I-84084 Salerno, Italy

[5] Univ G DAnnunzio, CNR, Ist Supercond Mat Innovativi & Dispositivi, SPIN, I-66100 Chieti, Italy

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 17期

关键词：

THIN-FILMS;

D O I：

10.1103/PhysRevB.100.174423

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The tetragonal phase of chromium (III) oxide, although unstable in the bulk, can be synthesized in epitaxial heterostructures. Theoretical investigation by density-functional theory predicts an antiferromagnetic ground state for this compound. We demonstrate experimentally antiferromagnetism up to 40 K in ultrathin films of t-Cr2O3 by electrical measurements exploiting interface effect within a neighboring ultrathin Pt layer. We show that magnetotransport in Pt is affected by both spin-Hall magnetoresistance and magnetic proximity effect while we exclude any role of magnetism for the low-temperature resistance anomaly observed in Pt.

引用

页数：8

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