島根大学論集. 自然科学

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島根大学論集. 自然科学 14
1965-02-05 発行

一次元反強磁性格子の帯磁率と比熱

Susceptibilities and Specific Heats of Linea Antiferromagnetic Lattices
Takehara, Toshio
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Recent experimental studies concerning the specific heat, the susceptibility and the paramagnetic resonance of single crystals of CuSO_4・5H_2O and CuSeO_4・5H_2O in the temperature range below 1°K revealed that there are two kinds of copper ion present in a unit cell. It is supposed that each species of ions are arranged antiferromagnetically in a linear chain and there are weak interactions between them. For these substances a four sublattice model is presented, and applying the molecular field theory. The Neel point and the susceptibility versus temperature curves are explained. The speecific heat jump is also expected.