High temperature ferromagnetism in single crystalline dilute Fe-doped BaTiO3

被引：106

作者：

Ray, Sugata ^{[1
,2
,3
]}

Mahadevan, Priya ^{[4
]}

Mandal, Suman ^{[5
]}

Krishnakumar, S. R. ^{[5
]}

Kuroda, Carlos Seiti ^{[6
]}

Sasaki, T. ^{[7
]}

Taniyama, Tomoyasu ^{[1
]}

Itoh, Mitsuru ^{[1
]}

机构：

[1] Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan

[2] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, India

[3] Indian Assoc Cultivat Sci, Ctr Adv Mat, Kolkata 700032, India

[4] SN Bose Natl Ctr Basic Sci, Kolkata 700098, India

[5] Saha Inst Nucl Phys, Surface Phys Div, Kolkata 700064, W Bengal, India

[6] Tokyo Inst Technol, Dept Innovat & Engineered Mat, Midori Ku, Yokohama, Kanagawa 2268502, Japan

[7] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.77.104416

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the observation of room temperature ferromagnetism in high quality, single crystalline dilute Fe-doped BaTiO3. The large equilibrium solubility of Fe ions in the matrix refutes uncertainties about secondary phase magnetism, which has often eclipsed this interesting field of research. While room temperature ferromagnetism is observed at and above 5% Fe concentrations, one finds a highly concave temperature dependence of the susceptibility. Using detailed ab initio calculation, this has been related to intrinsic magnetic inhomogeneities arising from positional disorder. Apart from providing a mechanism for the observed high temperature ferromagnetism, our results point out that intrinsic disorder is a generic and essential component of dilute magnetism.

引用

页数：6

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