^<161>Dy Mossbauer Spectroscopy of the Intermetallic Compounds DyNi_2Si_2, DyNi_2Ge_2 and DyAg_2Si_2

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概要

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• ^<161>Dy Mossbauer spectroscopic study has been performed on DyNi_2Si_2, DyNi_2Ge_2 and DyAg_2Si_2 in order to clarify microscopic properties of antiferromagnets with incommensurate and sinusoidally moment-modulated structure. The experiments were done using the standard ^<161>Tb Mossbauer sources prepared by neutron irradiation at the Japan Material Testing Reactor. The Mossbauer spectra of DyNi_2Si_2 are analyzed satisfactorily by a single set of hyperfine parameters, and hence the sinusoidal moment-modulation is considered to be realized through a distribution of spin relaxation rate. The broadened spectra of DyNi_2Ge_2 are fitted tentatively by three subspectra. It seems for DyNi_2Ge_2 that the incommensurate arrangement of Dy moments differed in magnitude as well as the distribution of spin relaxation rate originates the moment modulation. The fact that the spectrum of DyAg_2Si_2 at 3 K consists of two distinct subspectra ensures the complicated antiferromagnetic structure where two kinds of Dy moments differed in magnitude are arranged noncollinearly.DyNi_2Si_2DyNi_2Ge_2DyAg_2Si_2^<161>Dy Mossbauer effectsinusoidal moment modulation

• 東北大学の論文
• 1994-09-16

著者

• Kosaka Masashi

  Institute For Materials Research Tohoku University

• Kosaka Masashi

  Department Of Physics Saitama University

• YAMAGUCHI Yasuo

  Institute for Materials Research, Tohoku University

• ONODERA Hideya

  Institute for Materials Research, Tohoku University

• Murata Akifumi

  Institute For Materials Research Tohoku University:(present Address)toshiba Corporation Fuchu Works

• Kosaka M

  Saitama Univ. Saitama

• Yamaguchi Y

  Tohoku Univ. Sendai

• Yamaguchi Y

  Kumamoto Techno Res. Park Kumamoto Jpn

• OHASHI Masayoshi

  Institute for Materials Research,Tohoku University

• Onodera Hideya

  Institute For Materials Research

• Yamaguchi Yasuo

  Institute For Materials Research Tohoku University

• Ohashi M

  Tohoku Univ. Sendai Jpn

• Ohashi Masayoshi

  Kddi R&d Laboratories

• KOIZUKA Masaaki

  Institute for Materials Research, Tohoku University

• Ohashi M

  Institute For Materials Research Tohoku University

• Ohashi M

  Tohoku Univ. Sendai

• Ohashi M

  Yamagata Univ. Yamagata

• Yamaguchi Y

  Central Workshop Osaka University

• Ohashi Masanao

  Faculty Of Engineering Utsunomiya University

• Ohashi Masayoshi

  Institute For Material Research Tohoku University

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