Journal
PHYSICAL REVIEW MATERIALS
Volume 6, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevMaterials.6.124409
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Funding
- Interdisciplinary Thematic Institute QMat
- CNRS
- Inserm
- IdEx Unistra [ANR 10 IDEX0002]
- French Investments for the Future Program [ANR-17-EURE-0024]
- Region Grand Est
- Agence Nationale de la Recherche (France) [ANR-20-CE24-0012]
- SFRI STRAT'US Project [ANR 20 SFRI 0012]
- Agence Nationale de la Recherche (ANR) [ANR-20-CE24-0012] Funding Source: Agence Nationale de la Recherche (ANR)
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In this study, broadband ferromagnetic resonance is measured in Fe films to investigate their magnetic properties. The films are sandwiched between MgO layers and their characteristics, such as exchange constant, cubic, uniaxial and surface anisotropies, are analyzed by studying the spin wave modes in applied magnetic fields and varying film thickness. Additional measurements of nonreciprocal spin-wave propagation allow for the separation of each interface contribution to the total surface anisotropy. The experimental results are consistent with the proposed model of a quasi-bulk film interior and two magnetically different interfaces.
Broadband ferromagnetic resonance is measured in single crystalline Fe films of varying thickness sandwiched between MgO layers. An exhaustive magnetic characterization of the films (exchange constant, cubic, uniaxial and surface anisotropies) is enabled by the study of the uniform and the first perpendicular standing spin wave modes as a function of applied magnetic field and film thickness. Additional measurements of nonreciprocal spin-wave propagation allow us to separate each of the two interface contributions to the total surface anisotropy. The results are consistent with the model of a quasi-bulk film interior and two magnetically different top and bottom interfaces, a difference ascribed to different oxidation states.
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