Role of the antiferromagnetic bulk spins in exchange bias

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:416

Article

Schuller, Ivan K.^1,2  Morales, Rafael^3,4  Batlle, Xavier^5,6  Nowak, Ulrich⁷  Guentherodt, Gernot⁸ 

[1] Univ Calif San Diego, Ctr Adv Nanosci, La Jolla, CA 92093 USA

[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[3] Univ Basque Country UPV EHU, Dept Chem Phys & BCMat, Gipuzkoa, Spain

[4] Basque Fdn Sci, Ikerbasque, Bilbao 48011, Spain

[5] Univ Barcelona, Dept Fis Fonamental, C Marti & Franques S-N, Barcelona 08028, Catalonia, Spain

[6] Univ Barcelona, Inst Nanociencia & Nanotecnol, C Marti & Franques S-N, Barcelona 08028, Catalonia, Spain

[7] Univ Konstanz, Dept Phys, D-78464 Constance, Germany

[8] Rhein Westfal TH Aachen, Phys Inst IIA, Campus RWTH Melaten, D-52074 Aachen, Germany

关键词: Exchange bias;    Antiferromagnet;    Ferromagnet;    Exchange coupling;    Bulk antiferromagnetic spins/moments;   

DOI  :  10.1016/j.jmmm.2016.04.065

来源: Elsevier

【 摘 要 】

This Critical Focused Issue presents a brief review of experiments and models which describe the origin of exchange bias in epitaxial or textured ferromagnetic/antiferromagnetic bilayers. Evidence is presented which clearly indicates that inner, uncompensated, pinned moments in the bulk of the antiferromagnet (AFM) play a very important role in setting the magnitude of the exchange bias. A critical evaluation of the extensive literature in the field indicates that it is useful to think of this bulk, pinned uncompensated moments as a new type of a ferromagnet which has a low total moment, an ordering temperature given by the AFM Neel temperature, with parallel aligned moments randomly distributed on the regular AFM lattice. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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