Frustrations in the Ising chain with the third-neighbor interactions

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:514

Article

Zarubin, A., V¹  Kassan-Ogly, F. A.¹  Proshkin, A., I¹ 

[1] Russian Acad Sci, MN Mikheev Inst Met Phys, Ural Branch, S Kovalevskoy St 18, Ekaterinburg 620108, Russia

关键词: Ising chain;    Third-neighbor interactions;    Magnetic frustration;    Residual entropy;   

DOI  :  10.1016/j.jmmm.2020.167144

来源: Elsevier

【 摘 要 】

We study the frustration properties of the Ising model on a one-dimensional monoatomic equidistant lattice, taking into account the exchange interactions of atomic spins at the sites of the nearest, next-nearest, and third neighbors. The exact analytical expressions for the thermodynamic functions of the system are obtained using the Kramers-Wannier transfer matrix technique. Criteria for the emergence of magnetic frustrations in the presence of competition between the energies of exchange interactions are formulated. The points and intervals of the existence of frustrations, which depend on the values and signs of the exchange interactions, are found. The features of the entropy and heat capacity of this model in the frustration regime and its vicinity are investigated. Non-zero entropy values of the ground state of a frustrated system, as well as a two-peak temperature structure of the heat capacity in the vicinity of the frustration point, are found.

【 授权许可】

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