Multilayer transition in a spin-1 Blume–Capel model with RKKY interaction and quantum transverse anisotropy

doi:10.1088/1674-1056/20/1/017501

Abstract Using mean-field theory, we have studied the effect of quantum transverse anisotropies with RKKY interaction on the multi-layer transition and magnetic properties of the spin-1 Blume–Capel model of a system formed by two magnetic multi-layer materials, of different thicknesses, separated by a non-magnetic spacer of thickness M. It is found that the multilayer magnetic order--disorder transition temperature depends strongly on the value of the transverse anisotropy. The multilayer transition temperature decreases when increasing the transverse anisotropy. Furthermore, there exists a critical quantum transverse anisotropy Δ_xL beyond which the separate transitions occur in the two magnetic layers. The critical transverse anisotropy Δ_xL decreases (increases) on increasing the non-magnetic spacer of thickness M (on increasing the crystal field), and Δ_xL undergoes oscillations as a function of the Fermi level.

Keywords: quantum transverse anisotropy order–disorder layering transitions RKKY interaction

Received: 07 May 2010
Revised: 20 July 2010
Accepted manuscript online:

PACS:	75.10.-b	(General theory and models of magnetic ordering)
	75.10.Dg	(Crystal-field theory and spin Hamiltonians)
	75.30.Cr	(Saturation moments and magnetic susceptibilities)
	75.30.Gw	(Magnetic anisotropy)

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N. Tahiri, H. Ez-Zahraouy, and A. Benyoussef Multilayer transition in a spin-1 Blume–Capel model with RKKY interaction and quantum transverse anisotropy 2011 Chin. Phys. B 20 017501

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Multilayer transition in a spin-1 Blume–Capel model with RKKY interaction and quantum transverse anisotropy

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