The Mössbauer Effect of Fe(HCOO)2·2H2O between 4.2 and 0.027 K
1972 年 33 巻 1 号 p. 77-82
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1972 年 33 巻 1 号 p. 77-82
Mössbauer effect measurements of powdered Fe(HCOO)2·2H2O have been made at temperatures between 4.2 and 1.6 K and at the temperature of 0.027 K in average. A unit cell of this salt contains two each of inequivalent iron ions at A and B sites. Values of Mössbauer parameters at these two types of sites obtained at 4.2 K agree with those obtained at 6 K by other authors within experimental error. It is found that the internal magnetic at A sites is practically saturated at 1.6 K, while that at B sites remains to be zero even at 0.027 K; this suggests that spins at B sites are quenched at low temperatures. Mössbauer parameters for the A site are determined at 1.6 K.
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