Phys. Rev. Lett. Phys. Rev. A Phys. Rev. B Phys. Rev. C Phys. Rev. D Phys. Rev. E Phys. Rev. ST AB Phys. Rev. ST AB Rev. Mod. Phys. Phys. Rev. (Series I) Phys. Rev. Volume: Page/Article:

Phys. Rev. B 48, 3556–3559 (1993)

[Issue 5 – 1 August 1993 ]

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Biquadratic magnetic coupling in NiFe/Ag multilayers

Bernard Rodmacq

Département de Recherche Fondamentale sur la Matière Condensée, Centre d'Etudes Nucléaires, 85X, 38041 Grenoble Cédex, France

Karine Dumesnil and Philippe Mangin

Laboratoire de Métallurgie Physique et Sciences des Matériaux, Université de Nancy I, BP239, 54506 Vandoeuvre Cédex, France

Martine Hennion

Laboratoire Léon Brillouin, Centre d'Etudes de Saclay, 91191 Gif sur Yvette Cédex, France

Magnetoresistance, magnetization, and polarized neutron experiments have been performed on Ni₈₁Fe₁₉/Ag multilayers. The results give evidence for both biquadratic and bilinear contributions to the total coupling energy. The strong temperature dependence of the biquadratic term leads to a crossover from a canted state at low temperature to an antiferromagnetic one beyond 100 K. We suggest that the biquadratic term could arise from local concentration fluctuations in the chemically disordered NiFe layers.

©1993 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v48/p3556
DOI: 10.1103/PhysRevB.48.3556
PACS: 75.70.Fr, 75.25.+z, 75.50.Rr

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