Thermal Expansion, Electrical Resistance and the Effect of Hydrostatic Pressure on the Neel Temperature in Fe-Mn Alloys
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概要
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Thermal expansion, temperature change of electrical resistance and its change due to hydrostatic pressure, and magnetic susceptibility were measured with some antiferromagnetic Fe-Mn alloys containing 30 to 40 at% Mn. It was found that an additional magnetic volume expensivity, δV/V, due to an antiferromagnetic spin ordering is as large as 10^<-3>〜 10^<-4>, and the change of the Neel temperature with pressure, (dT_N)/(dP), is about -2.5x 10^<-3> deg. Kg^<-1>・cm^2 in 30 at% Mn alloy. With these values, the volume dependence of the molecular field constant, (dA)/(dω), is estimated to be positive by the molecular field theory with the localized moment model. The results are discussed in comparison with Bethe-Slater's and Weiss' theories and with the similar behavior in some ferromagnetic invar-type alloys.
- 社団法人日本物理学会の論文
- 1966-10-05
著者
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Fujimori Hiroyasu
The Research Institute For Iron Steel And Other Metals Tohoku University
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Fujimori Hiroyasu
The Resarch Institute For Iron Steel And Other Metals
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