Sperl, Matthias and Kipferl, W. and Dumm, M. and Bayreuther, Guenther (2006) Spin-wave excitations in epitaxial ultrathin FeCo with zero magnetocrystalline anisotropy. JOURNAL OF APPLIED PHYSICS, 99 (8): 08J703. ISSN 0021-8979,
Full text not available from this repository. (Request a copy)Abstract
Spin-wave theory predicts reduced thermal spin-wave excitations due to a magnetic anisotropy. Recent results show that a strong uniaxial in-plane anisotropy in ultrathin Fe/GaAs(001) films indeed stabilizes the ferromagnetic order versus thermal spin excitations [Kipferl , J. Appl. Phys. 97, 10B313 (2005)]. In order to study whether a fourth-order in-plane anisotropy has a similar effect epitaxial Fe70Co30/Au(001) samples with zero magnetocrystalline anisotropy were studied and compared to results for Fe/Au(001). The temperature dependence of the spontaneous magnetization M-S for T < 0.5T(c) can be well described by the Bloch [Z. Phys. 61, 206 (1930)] T-3/2 law in the entire thickness range. However, for each thickness B is reduced in Fe70Co30/Au(001) compared to Fe/Au(001) films despite the reduced anisotropy. This means that the effect of a weak in-plane anisotropy is overcompensated by the enhanced exchange interaction. (C) 2006 American Institute of Physics.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TEMPERATURE-DEPENDENCE; FILMS; MAGNETIZATION; TRANSITION; EXCHANGE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Günther Bayreuther |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 16 Feb 2021 07:35 |
| Last Modified: | 16 Feb 2021 07:35 |
| URI: | https://pred.uni-regensburg.de/id/eprint/34664 |
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