Spin Fluctuations in an Octahedral Antiferromagnet Mn3Pt Alloy
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- Ikeda Takashi
- School of Science and Engineering, Waseda University
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- Tsunoda Yorihiko
- School of Science and Engineering, Waseda University
Bibliographic Information
- Other Title
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- Spin Fluctuations in an Octahedral Antiferromagnet Mn<sub>3</sub>Pt Alloy
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Description
A new spin frustration system with an octahedral configuration of magnetic atoms was found. In neutron scattering measurements for an ordered Mn3Pt alloy, inelastic diffuse scattering intensity distributes along the first Brillouin zone-boundary of the fcc structure in the paramagnetic and the F-phases. Within the calculations based on a RPA, the experimental data in the paramagnetic phase are reproduced using antiferromagnetic couplings between the spins up to the third-neighbor exchange interactions. In the F-phase below the Néel temperature, a part of the Mn spins still fluctuates at the special site. The existence of the F-phase is a characteristic of the octahedral spin frustration system. The effects of the chemical disorder on the spin frustration are also studied using a specimen with a small atomic LRO parameter.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 72 (10), 2614-2621, 2003
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204186823936
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- NII Article ID
- 210000104501
- 110001954273
- 130004538272
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- NII Book ID
- AA00704814
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- BIBCODE
- 2003JPSJ...72.2614I
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 6713928
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed