Thermal electric effects in Fe|GaAs|Fe tunnel junctions

Jia, Xintao; Xia, Ke

doi:10.1063/1.4773464

Cited by 7 publications

(2 citation statements)

References 49 publications

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“…Ab initio calculations have been performed for MgObased MTJs, where the TMT dependence on temperature was computed [21,26,27], and which has been used to understand previously mentioned experiments [14]. Similar calculations have been performed for GaAs-based MTJs [28]. Also, inspired by an aforementioned experiment [13], theoretical descriptions of thermal spin transport for ferromagnet/insulator/semiconductor MTJs have also been developed [22,29].…”

Section: Introductionmentioning

confidence: 99%

Tunneling magnetothermopower in magnetic tunnel junctions

2014

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Thermally induced spin-dependent transport across magnetic tunnel junctions (MTJs) is theoretically investigated. We analyze the thermal analog of Slonczewski's model (as well as its limiting case-Julliere's model) of tunneling magnetoresistance and obtain analytical expressions for the junction thermopower and the tunneling magnetothermopower (TMT). The analytical model is tested numerically for the special case of an Al 2 O 3 -based MTJ, for which we analyze the dependence of the thermopower and TMT on the relative magnetization orientations, as well as on the barrier height and thickness. We show that at a certain barrier height TMT vanishes, separating the region of positive and negative TMT. As its electrical prototype, this thermal spin transport model should serve as a phenomenological benchmark for analyzing experimental and first-principles calculations of thermopower in magnetic tunnel junctions. The analytical expressions can be used as a first estimate of the magnetothermopower of the junctions using ab initio band structure data of the junction ferromagnets.

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Section: Introductionmentioning

confidence: 99%

Tunneling magnetothermopower in magnetic tunnel junctions

2014

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“…14 Similar calculations have been performed for GaAs-based MTJs. 28 Also inspired by an aforementioned experiment, 13 theoretical descriptions of thermal spin transport for ferromagnet/insulator/semiconductor MTJs have also been developed. 22,29 Finally, theory regarding all metallic junctions has as well been recently studied.…”

Section: Introductionmentioning

confidence: 99%

Tunneling anisotropic thermopower and Seebeck effects in magnetic tunnel junctions

2014

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The tunneling anisotropic magnetothermopower (TAMT) and the tunneling anisotropic spin-Seebeck (TASS) effects are studied for a magnetic tunnel junction (MTJ) composed of a ferromagnetic electrode, a zinc-blende semiconductor, and a normal metal. We develop a theoretical model for describing the dependence of a thermally induced tunneling current across the MTJ on the in-plane orientation of the magnetization in the ferromagnetic layer. The model accounts for the specific Bychkov-Rashba and Dresselhaus spin-orbit interactions present in these systems, which are responsible for the C 2v symmetry we find in the TAMT and the TASS.

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Electric and thermo spin transfer torques in Fe/Vacuum/Fe tunnel junction

Jia

Xia

2013

Front. Phys.

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Thermal electric effects in Fe|GaAs|Fe tunnel junctions

Cited by 7 publications

References 49 publications

Tunneling magnetothermopower in magnetic tunnel junctions

Tunneling magnetothermopower in magnetic tunnel junctions

Tunneling anisotropic thermopower and Seebeck effects in magnetic tunnel junctions

Electric and thermo spin transfer torques in Fe/Vacuum/Fe tunnel junction

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