Single Pt/Co(0.5 nm)/Pt Nano-discs: Beyond the Coherent Spin Reversal Model and thermal stability
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概要
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We investigate the dynamics of the magnetization reversal in single Pt/Co(0.5 nm)/Pt nano-discs with diameter 130 nm, fabricated by He+ ion irradiation. They exhibit a very narrow distribution of small switching fields and a perpendicular magnetic anisotropy. In spite of their small magnetic volume, thermally activated magnetization reversal cannot be interpreted within the usual Néel-Brown model. Non-coherent magnetization reversal proceeds here by fast nucleation at nano-disc borders and rather slow wall motion towards their center. Dynamics are perfectly accounted for by a 2D-confined droplet model, involving the wall energy rather than the anisotropy energy. On the other hand, the blocking temperature for these nano-discs is well described by the coherent spin reversal model.
- 社団法人 日本磁気学会の論文
著者
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Ferre J.
Laboratoire De Physlque Des Solides Umr Cnrs 8502 Univ. Paris-sud
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Adam J.
Laboratoire de Physique des Solides, Université Paris-Sud
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Rohart S.
Laboratoire de Physique des Solides, Université Paris-Sud
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Jamet J.-P.
Laboratoire de Physique des Solides, Université Paris-Sud
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Mougin A.
Laboratoire de Physique des Solides, Université Paris-Sud
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Bernas H.
CSNSM, Université Paris-Sud
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Faini G.
Laboratoire de Photonique et Nanostructures
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Fassbender J.
Institute of Ion Beam Physics and Material Research, Forschungszentrum Desden-Rossendorf
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Adam J.P.
Laboratoire de Physique des Solides, Université Paris-Sud
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Jamet J.-P.
Laboratoire de Physique des Solides, Université Paris-Sud
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Adam J.P.
Laboratoire de Physique des Solides, Université Paris-Sud
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Ferre J.
Laboratoire de Physique des Solides, UMR CRNS 8502, Universite Paris-Sud
関連論文
- Single Pt/Co(0.5 nm)/Pt Nano-discs: Beyond the Coherent Spin Reversal Model and thermal stability
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