Changes in ferromagnetic spin structure induced by exchange bias in Fe/$\mathrm{Mn}{\mathrm{F}}_{2}$ films

Changes in ferromagnetic spin structure induced by exchange bias in Fe/ $Mn F_{2}$ films

W. A. A. Macedo, B. Sahoo, V. Kuncser, J. Eisenmenger, I. Felner, J. Nogués, Kai Liu, W. Keune, and Ivan K. Schuller

Phys. Rev. B 70, 224414 – Published 14 December 2004

Abstract

Depth-dependent Fe spin structures of the remanent state in exchange-coupled Fe/ $Mn F_{2}$ films have been probed using ${}^{57}{Fe}$ conversion electron Mössbauer spectroscopy, both above and well below the $Mn F_{2}$ Néel temperature. ${}^{57}{Fe}$ probe layers were embedded either at the Fe/ $Mn F_{2}$ interface or in the center of the Fe film. Remarkably, exchange bias induces a significant change of the in-plane angular distribution of the Fe magnetic moments at the interface and inside the Fe film, away from the saturation magnetization direction. Results from vector magnetometry support these conclusions.

Received 15 September 2004

DOI:https://doi.org/10.1103/PhysRevB.70.224414

Authors & Affiliations

W. A. A. Macedo^1,2,*, B. Sahoo³, V. Kuncser^3,†, J. Eisenmenger^1,‡, I. Felner⁴, J. Nogués⁵, Kai Liu⁶, W. Keune³, and Ivan K. Schuller¹

¹Physics Department, University of California San Diego, La Jolla, California 92093, USA
²Laboratório de Física Aplicada, Centro de Desenvolvimento da Tecnologia Nuclear, 30123-970 Belo Horizonte, Minais Gerais, Brazil
³Institut für Physik, Universität Duisburg-Essen, D-47048 Duisburg, Germany
⁴Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel
⁵Institució Catalana de Recerca i Estudis Avançats (ICREA) and Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
⁶Physics Department, University of California, Davis, California 95616, USA

^*Electronic address: wmacedo@cdtn.br
^†Permanent address: National Institute of Physics of Materials, RO-76900 Bucharest-Magurele, Romania.
^‡Present address: Abteilung Festkörperphysik, Universität Ulm, D-89069 Ulm, Germany.

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Vol. 70, Iss. 22 — 1 December 2004

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Physical Review B

covering condensed matter and materials physics

Changes in ferromagnetic spin structure induced by exchange bias in Fe/ $Mn F_{2}$ films

W. A. A. Macedo, B. Sahoo, V. Kuncser, J. Eisenmenger, I. Felner, J. Nogués, Kai Liu, W. Keune, and Ivan K. Schuller

Phys. Rev. B 70, 224414 – Published 14 December 2004

Abstract

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Physical Review B

covering condensed matter and materials physics

Changes in ferromagnetic spin structure induced by exchange bias in Fe/MnF2 films

W. A. A. Macedo, B. Sahoo, V. Kuncser, J. Eisenmenger, I. Felner, J. Nogués, Kai Liu, W. Keune, and Ivan K. Schuller

Phys. Rev. B 70, 224414 – Published 14 December 2004

Abstract

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Changes in ferromagnetic spin structure induced by exchange bias in Fe/ $Mn F_{2}$ films