Uniform susceptibility of classical antiferromagnets in one and two dimensions in a magnetic field |
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Authors: | D. Hinzke U. Nowak D.A. Garanin |
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Affiliation: | 1.Theoretische Tieftemperaturphysik,Gerhard-Mercator-Universit?t-Duisburg,Duisburg,Germany;2.Max-Planck-Institut für Physik komplexer Systeme,Dresden,Germany |
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Abstract: | We simulated the field-dependent magnetization m(H,T) and the uniform susceptibility of classical Heisenberg antiferromagnets in the chain and square-lattice geometry using Monte Carlo methods. The results confirm the singular behavior of at small T,H: and , where D=3 is the number of spin components, J 0=zJ, and z is the number of nearest neighbors. A good agreement is achieved in a wide range of temperatures T and magnetic fields H with the first-order 1/D expansion results (D.A. Garanin, J. Stat. Phys. 83, 907 (1996)). Received 20 March 2000 |
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Keywords: | PACS. 75.10.Hk Classical spin models - 75.50.Ee Antiferromagnetics - 75.40.Mg Numerical simulation studies |
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