Magnetic Susceptibility of Anisotropically Interacting Spin-Pair Systems

摘要

The Oguchi theory of antiferromagnetism has been modified for antiferromagnetically interacting spin-pair systems with anisotropic exchange interaction. The parallel and perpendicular susceptibilities (ヶ～ and ヶ⊙) have been expressed as functions of exchange interactions (Jz and ャ=Jx/Jz), anisotropic molecular field parameters (リ and リx), gz and gx. In contrast to the previous theories, the parallel susceptibilities are not the same as the perpendicular susceptibilities above Neel temperature TN.