Magnetic excitations in ferromagnetic phase of MnP

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• 作者：Shin-ichiro Yano ; Shinichi Itoh ; Tetsuya Yokoo ; Setsuo Satoh ; Daichi Kawana ; Yusuke Kousaka ; Jun Akimitsu ; Yasuo Endoh
• 关键词：MnP ; Inelastic neutron scattering ; Spin waves ; Ferromagnet ; Phase transition ; Intermetallic compound
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2013
• 出版时间：December, 2013
• 年：2013
• 卷：347
• 期：Complete
• 页码：33-38
• 全文大小：607 K

文摘

Inelastic neutron scattering experiments were performed on an intermetallic compound, MnP. We used a newly developed High Resolution Chopper Spectrometer, HRC, for energy transfers , besides various triple axis spectrometers; LTAS for energy transfers , TOPAN for and TAS-1 for . 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.