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Stability of ferrimagnetic multilayers |
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| Authors: | Ana L. Dantas,A.S. Carriç o |
| Affiliation: | a Departamento de Física, Universidade do Estado do Rio Grande do Norte, 59600-900 Mossoró, RN, Brazil b Departamento de Física, Universidade Federal de Sergipe, 49100-000 Aracaju, SE, Brazil c Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte (UFRN), Campus Universitrio, 59078-970 Natal, RN, Brazil |
| Abstract: | We study the field induced instability of the ground state of ferrimagnetic multilayers consisting of a stacking alternating two different uniaxial ferromagnetic layers. For multilayers with even number of layers N, we obtain analytical expressions for the critical fields in terms of the magnetic parameters (anisotropies, and interlayer exchange coupling), for any value of N. The critical fields are calculated from the energy fluctuations for small variations in the equilibrium magnetic profile. The form of the hysteresis curves is discussed, using the expressions of the critical fields. |
| Keywords: | 75.70.Cn |
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