Remarkable strain-induced magnetic anisotropy in epitaxial Co2MnGa (001) films

Pechan, Michael J.; Yu, Chengtao; Carr, D. M.; Palmstrøm, C. J.

doi:10.1016/j.jmmm.2004.09.090

Cited by 37 publications

(17 citation statements)

References 13 publications

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“…Specifically, K c decreases with increasing thickness. For the IP H orientation dependence, the absence of a uniaxial contribution supports the observation by Pechan et al [ 44 ] that the strain is isotropic in the film plane.…”

Section: Resultssupporting

confidence: 88%

“…Further, Co 2 MnGa films show negative magnetoresistances [ 40 ] and high spin polarization [ 41 , 42 ], which in turn results in low magnetic damping [ 42 , 43 ]. Interestingly, Pechan et al reported that Co 2 MnGa films grown on different seed layers achieved tunable strain states, which induced remarkably large two-fold and four-fold in-plane (IP) anisotropies [ 44 ].…”

Section: Introductionmentioning

confidence: 99%

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Magnetic and Electronic Properties of Weyl Semimetal Co2MnGa Thin Films

et al. 2021

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Magnetic Weyl semimetals are newly discovered quantum materials with the potential for use in spintronic applications. Of particular interest is the cubic Heusler compound Co2MnGa due to its inherent magnetic and topological properties. This work presents the structural, magnetic and electronic properties of magnetron co-sputtered Co2MnGa thin films, with thicknesses ranging from 10 to 80 nm. Polarized neutron reflectometry confirmed a uniform magnetization through the films. Hard x-ray photoelectron spectroscopy revealed a high degree of spin polarization and localized (itinerant) character of the Mn d (Co d) valence electrons and accompanying magnetic moments. Further, broadband and field orientation-dependent ferromagnetic resonance measurements indicated a relation between the thickness-dependent structural and magnetic properties. The increase of the tensile strain-induced tetragonal distortion in the thinner films was reflected in an increase of the cubic anisotropy term and a decrease of the perpendicular uniaxial term. The lattice distortion led to a reduction of the Gilbert damping parameter and the thickness-dependent film quality affected the inhomogeneous linewidth broadening. These experimental findings will enrich the understanding of the electronic and magnetic properties of magnetic Weyl semimetal thin films.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Magnetic and Electronic Properties of Weyl Semimetal Co2MnGa Thin Films

et al. 2021

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“…of our films with the highest ordering is still lower than that of the bulk (4.05 m B ) [2] and Co 2 MnGa epitaxial films (3.5 m B ) [1]. Moreover, M S and M eff differ substantially which may be related also to a high easy plane anisotropy of Co 2 MnGa films due to magnetostriction [1]. Using the high-temperature FMR measurements in the perpendicular configuration, we checked a temperature range in which the amorphous Co 2 MnGa films are ordered.…”

mentioning

confidence: 55%

“…However, the saturation magnetization M S (M S E 450 G-2.5 m B f.u.) of our films with the highest ordering is still lower than that of the bulk (4.05 m B ) [2] and Co 2 MnGa epitaxial films (3.5 m B ) [1]. Moreover, M S and M eff differ substantially which may be related also to a high easy plane anisotropy of Co 2 MnGa films due to magnetostriction [1].…”

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confidence: 62%