TY - JOUR
T1 - Magnetization reversal, damping properties and magnetic anisotropy of L 10-ordered FeNi thin films
AU - Thiruvengadam, V.
AU - Singh, B. B.
AU - Kojima, T.
AU - Takanashi, K.
AU - Mizuguchi, M.
AU - Bedanta, S.
N1 - Funding Information:
We acknowledge the financial support by the Department of Atomic Energy (DAE), the Department of Science and Technology (DST-SERB) of Government of India, the DST-Nanomission [No. SR/NM/NS-1018/2016(G)], and DST. B.B.S. acknowledges the DST Government of India for the INSPIRE faculty fellowship.
Publisher Copyright:
© 2019 Author(s).
PY - 2019/11/11
Y1 - 2019/11/11
N2 - L 1 0-ordered magnetic alloys such as FePt, FePd, CoPt, and FeNi are well known for their large magnetocrystalline anisotropy. Among these, the L 1 0-FeNi alloy is an economically viable material for magnetic recording media because it does not contain rare earth and noble elements. In this work, L 1 0-FeNi films with three different strengths of anisotropy were fabricated by varying the deposition process in a molecular beam epitaxy system. We have investigated magnetization reversal along with domain imaging via a magneto-optic Kerr effect based microscope. It is found that in all three samples, the magnetization reversal happens via domain wall motion. Furthermore, ferromagnetic resonance spectroscopy was performed to evaluate the damping constant (α) and magnetic anisotropy. It was observed that the FeNi sample with a moderate strength of anisotropy exhibits a low value of α ∼ 4.9 × 10 - 3. In addition to this, it was found that the films possess a mixture of cubic and uniaxial anisotropies.
AB - L 1 0-ordered magnetic alloys such as FePt, FePd, CoPt, and FeNi are well known for their large magnetocrystalline anisotropy. Among these, the L 1 0-FeNi alloy is an economically viable material for magnetic recording media because it does not contain rare earth and noble elements. In this work, L 1 0-FeNi films with three different strengths of anisotropy were fabricated by varying the deposition process in a molecular beam epitaxy system. We have investigated magnetization reversal along with domain imaging via a magneto-optic Kerr effect based microscope. It is found that in all three samples, the magnetization reversal happens via domain wall motion. Furthermore, ferromagnetic resonance spectroscopy was performed to evaluate the damping constant (α) and magnetic anisotropy. It was observed that the FeNi sample with a moderate strength of anisotropy exhibits a low value of α ∼ 4.9 × 10 - 3. In addition to this, it was found that the films possess a mixture of cubic and uniaxial anisotropies.
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U2 - 10.1063/1.5126324
DO - 10.1063/1.5126324
M3 - Article
AN - SCOPUS:85074976433
SN - 0003-6951
VL - 115
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 20
M1 - 202402
ER -