Magnetic excitations in ferromagnetic phase of MnP

被引：12

作者：

Yano, Shin-ichiro ^{[1
]}

Itoh, Shinichi ^{[2
]}

Yokoo, Tetsuya ^{[2
]}

Satoh, Setsuo ^{[2
]}

Kawana, Daichi ^{[3
]}

Kousaka, Yusuke ^{[1
]}

Akimitsu, Jun ^{[1
]}

Endoh, Yasuo ^{[2
,4
]}

机构：

[1] Aoyama Gakuin Univ, Dept Phys & Math, Sagamihara, Kanagawa 2298558, Japan

[2] High Energy Accelerator Org, Inst Mat Struct Sci, Div Neutron Sci, Tsukuba, Ibaraki 3050801, Japan

[3] High Energy Accelerator Org, Inst Mat Struct Sci, Condensed Matter Res Ctr, Tsukuba, Ibaraki 3050801, Japan

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

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2013年 / 347卷

关键词：

MnP; Inelastic neutron scattering; Spin waves; Ferromagnet; Phase transition; Intermetallic compound; FIELD; TRANSITION;

D O I：

10.1016/j.jmmm.2013.07.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Inelastic neutron scattering experiments were performed on an intermetallic compound, MnP. We used a newly developed High Resolution Chopper Spectrometer, HRC, for energy transfers E <= 75 meV, besides various triple axis spectrometers; LTAS for energy transfers E <= 2 meV, TOPAN for E <= 7.5 meV and TAS-1 for E <= 35 meV. Spin wave excitations were observed in the ferromagnetic phase of MnP in the entire Brillouin zone along the a*- and b*-axes. The zone boundary energies of spin waves were determined to be around 60 meV along the a*-axis and around 75 meV along the b*-axis, and the dispersion relations showed two branches for both axes. The observed dispersion relations of spin waves were well described by an isotropic Heisenberg interaction adding a single ion anisotropy with two sub-lattices. (c) 2013 Published by Elsevier B.V.

引用

页码：33 / 38

页数：6

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