The temperature dependence of the magnetic anisotropy and magnetization M of d=5-20 mono-layer (ML) thick Fe films on {4x6}GaAs(001) has been measured using in situ ferromagnetic resonance and a superconducting quantum interference device from 40 to 400 K. We find a reduced magnetization for d < 7 ML and for all films a Curie temperature T-c > 400 K. From a full angular, thickness and temperature-dependent analysis we determine second K-2(T) and fourth K-4(T) order magnetic anisotropy constants as well as the temperature dependence of the surface-interface K-2 perpendicular to(s,eff)(T) and volume K-2 perpendicular to(v)(T) contributions to the out-of-plane uniaxial anisotropy. The low-temperature values are K-2 perpendicular to(s,eff)(T -> 0)=1.26 +/- 0.1x10(-3)J/m(2) (649 +/- 51.5 mu eV/atom) and K-2 perpendicular to(v)(T -> 0)=4 +/- 9x10(4) J/m(3) (3 +/- 6.7 mu eV/atom). The temperature dependence of K-2 perpendicular to(T)/K-2 perpendicular to(0) for 5 ML Fe on {4x6}GaAs(001) is proportional to [M(T)/M(0)](Gamma) with an exponent Gamma=2.9 +/- 0.2 being very close to the theoretically expected one.
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Univ Tsukuba, Dept Appl Phys, Tsukuba 3058573, Japan
Natl Inst Mat Sci NIMS, Res Ctr Magnet & Spintron Mat, Tsukuba 3050047, JapanUniv Tsukuba, Dept Appl Phys, Tsukuba 3058573, Japan
Koizumi, Hiroki
Yanagihara, Hideto
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Univ Tsukuba, Dept Appl Phys, Tsukuba 3058573, Japan
Univ Tsukuba, Tsukuba Res Ctr Energy Mat Sci TREMS, Tsukuba 3058573, JapanUniv Tsukuba, Dept Appl Phys, Tsukuba 3058573, Japan
Yanagihara, Hideto
Okabayashi, Jun
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Univ Tokyo, Res Ctr Spectrochem, Tokyo 1130033, JapanUniv Tsukuba, Dept Appl Phys, Tsukuba 3058573, Japan
Okabayashi, Jun
Kondo, Takahiro
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Univ Tsukuba, Tsukuba Res Ctr Energy Mat Sci TREMS, Tsukuba 3058573, Japan
Univ Tsukuba, Dept Mat Sci, Tsukuba 3058573, JapanUniv Tsukuba, Dept Appl Phys, Tsukuba 3058573, Japan
Kondo, Takahiro
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Kubota, Takahide
Takanashi, Koki
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Tohoku Univ, Inst Mat Res, Sendai 9808576, Japan
Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai 3191195, JapanUniv Tsukuba, Dept Appl Phys, Tsukuba 3058573, Japan
Takanashi, Koki
Sonobe, Yoshiaki
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Waseda Univ, Res Org Nano & Life Innovat, Tokyo 1620041, JapanUniv Tsukuba, Dept Appl Phys, Tsukuba 3058573, Japan