Anisotropic spin waves in a metallic antiferromagnet Nd0.45Sr0.55MnO3

被引：51

作者：

Yoshizawa, H ^{[1
]}

Kawano, H

Fernandez-Baca, JA

Kuwahara, H

Tokura, Y

机构：

[1] Univ Tokyo, ISSP, Neutron Scattering Lab, Tokai, Ibaraki 3191106, Japan

[2] Inst Phys & Chem Res, Wako, Saitama 35101, Japan

[3] Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA

[4] Joint Res Ctr Atom Technol, Tsukuba, Ibaraki 305, Japan

[5] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 113, Japan

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.58.R571

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate that Nd0.45Sr0.55MnO3 is an example of a metallic antiferromagnetic manganite, and that it exhibits very anisotropic spin-wave dispersion relations with intra- and interplanar exchange parameters 8JS = 32.6 +/- 0.9 meV and 4J' S= - 10.1 +/- 0.5 meV, respectively. This anisotropy reflects underlying d(x)2(-y)2-type orbital ordering, and the metallic behavior indicates that a charge ordering is decoupled from the orbital ordering in this system. [S0163-1829(98)51926-1].

引用

页码：R571 / R574

页数：4

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