Magnetic Susceptibility and NMR Studies of XAI-Type Intermetallic Compounds (X=Ni, Co and Fe)
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概要
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Magnetic susceptibility and nuclear magnetic resonance of Al^<27> and Co^<59> were studied for Ni-Al, Co-Al, and Fe-Al intermetallic compounds with CsCl-type structure. Curie-Weiss type paramagnetism was observed for the Fe-Al and cobalt rich Co-Al compounds, and Pauli type paramagnetism was observed for the Al rich Co-Al and all Ni-Al compounds. A temperature independent negative Knight shift of Al^<27> was observed in the Fe-Al system. The line width increases in the Fe-Al and Co-Al compounds when Al content decreases and Curie-Weiss type paramagnetism appears. The line intensity shows a sharp maximum at the stoichiometric composition XAL, and decreases steeply to the both sides due to the effects of quadrupole interactions. All the results have been discussed based on te band model. It is concluded that the excess Co and Fe atoms make small clusters to which the positive increase in the susceptibility and the line broadening are attributed, and that the vacancies at the Ni and Co sites in the Al-rich sides of the Ni-Al and Co-Al systems produce second-order quadrupole effects on the nearest neighbor aluminum.
- 社団法人日本物理学会の論文
- 1968-10-05
著者
-
Iida Shuichi
Department Of Physics Faculty Of Science The University Of Tokyo
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Miyatani Kazuo
Department Of Materials Science And Engineering Ehime University
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Miyatani Kazuo
Department Of Physics Faculty Of Science University Of Tokyo:tokyo Metropolitan University:(present
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Iida Shuichi
Department Of Physics Faculity Of Science University Of Tokyo
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