High-Temperature Ferrimagnetism Driven by Lattice Distortion in Double Perovskite Ca2FeOsO6

被引：136

作者：

Feng, Hai L. ^{[1
,2
]}

Arai, Masao ^{[3
]}

Matsushita, Yoshitaka ^{[4
]}

Tsujimoto, Yoshihiro ^{[5
]}

Guo, Yanfeng ^{[1
]}

Sathish, Clastin I. ^{[1
,2
]}

Wang, Xia ^{[1
]}

Yuan, Ya-Hua ^{[1
,2
]}

Tanaka, Masahiko ^{[6
]}

Yamaura, Kazunari ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci, Superconducting Properties Unit, Tsukuba, Ibaraki 3050044, Japan

[2] Hokkaido Univ, Grad Sch Chem Sci & Engn, Kita Ku, Sapporo, Hokkaido 0600810, Japan

[3] Natl Inst Mat Sci, Computat Mat Sci Ctr, Tsukuba, Ibaraki 3050044, Japan

[4] Natl Inst Mat Sci, Mat Anal Stn, Tsukuba, Ibaraki 3050047, Japan

[5] Natl Inst Mat Sci, Mat Proc Unit, Tsukuba, Ibaraki 3050047, Japan

[6] Natl Inst Mat Sci, Synchrotron Xray Stn SPring 8, Sayo, Hyogo 6795148, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2014年 / 136卷 / 09期

基金：

日本学术振兴会;

关键词：

BOND-VALENCE PARAMETERS; CRYSTAL-STRUCTURE; ELECTRONIC-STRUCTURE; MAGNETORESISTANCE; FERROMAGNETISM; SR2CRREO6;

D O I：

10.1021/ja411713q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

5d and 3d hybrid solid-state oxide Ca2FeOsO6 crystallizes into an ordered double-perovskite structure with a space group of P2(1)/n with high-pressures and temperatures. Ca2FeOsO6 presents a long-range ferrimagnetic transition at a temperature of similar to 320 K (T-c) and is not a band insulator, but is electrically insulating like the recently discovered Sr2CrOsO6 (Tc similar to 725 K). The electronic stat of Ca2FeOsO6 is adjacent to a half-metallic state as well as that of Sr2CrOsO6. In addition, the high-T-c ferrimagnetism was driven by lattice distortion, which was observed for the first time among double-perovskite oxides and represents complex interplays between spins and orbitals. Unlike conventional ferrite and garnet, the interplays likely play a pivotal role of the ferrimagnetism. A new class of 5d-3d hybrid ferrimagnetic insulators with high-T-c is established to develop practically and scientifically useful spintronic materials.

引用

页码：3326 / 3329

页数：4

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