Magnetic Properties of Amorphous Fe-Nd Alloys

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概要

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• Melt-spun amorphous Fe. ,Nd. alloys (0.113,v30.60) were investigated by themagnetization measurement up to 143 kOe and the M6ssbauer spectroscopy. Thecoercive field at 4.2 K increases abruptly at arouncl ,X'=0.30 with increasing x, amounting to 53 k0e at x=O.4O. The hyperfine field of "Fe at 77 K is independent of x andabout 300 k0e on an average, suggesting that the magnetic moment of Fe is about2,Oq./atom throughout this system. On this assumption and the measuredmagnetization at 4.2 K, it is estimated that the average Nd moment is about 3.2p./ atom at the low x limit. This value corresponds to the free ion value of Nd". TheNd moment decreases with increasing x to one half, 1.6 p./ atom. A ferromagneticcluster model with large random anisotropy is proposed for the high coercivity alloysof this system. Magnetizatiota curves at 4.2 K are well explaitted by the model, by anadjustment of the parameters for the anisotropy energy of The cluster and the inter-cluster coupling. The concentration dependence of the coercive field is discussedbriefly.

• 社団法人日本物理学会の論文
• 1990-07-15

著者

• KITA Eiji

  Institute of Applied Physics, University of Tsukuba

• Nakagawa Yasuaki

  Institute for Materials Research, Tohoku University

• NAGAYAMA Katsuhisa

  Department of Materials Science, Faculty of Engineering, Shibaura Institute of Technology

• Nagayama Katsuhisa

  Department Of Engineering Shibaura Institute Of Technology

• Nagayama Katsuhisa

  Department Of Metallurgy And Materials Science Faculty Of Engineering University Of Tokyo

• SIRATORI Kiiti

  Faculty of Science,Osaka University

• Kita E

  Tsukuba Univ. Tsukuba

• Siratori K

  Kyushu Univ. Fukuoka

• Siratori Kiiti

  Institute Of Materials Structure Science High Energy Accelerator Research Organization

• Siratori Kiiti

  Department Of Physics Osaka University

• Shiratori K

  Kyushu Univ. Fukuoka

• Siratori Kiiti

  Faculty Of Science Kyusyu University

• INO Hiromitsu

  Department of Metallurgy and Materials Science,Faculty of Engineering,University of Tokyo

• SAITO Naoaki

  Institute for Materials Research,Tohoku University

• Kita Eiji

  Institute Of Applied Physics University Of Tukuba

• Nakagawa Y

  Tohoku Univ. Sendai

• Nakagawa Y

  Himeji Inst. Technol. Ako‐gun

• Nakagawa Y

  Institute For Materials Research Tohoku University

• Nakagawa Yasuaki

  Department Of Electronics Tohoku Institute Of Technology

• Siratori Kiiti

  Depatment Of Physics Faculty Of Science Kyusyu University

• Nakagawa Yasuaki

  Institute For Material Research Tohoku University

• Ino Hiromitsu

  Department Of Materials Science Faculty Of Engineering Tokyo University

• Nakagawa Yasuaki

  The Research Institute For Iron Steel And Other Metals Tohoku University

• Saito Naoaki

  Institute For Materials Research Tohoku University

• Kita Eiji

  Institute For Applied Physics Tsukuba University

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