Home > Publications database > Anisotropic Magneto-Thermopower in M/Co/M (M = Cu; Pd; Pt) Trilayer Systems > print

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037 _ _ |a FZJ-2016-02066
041 _ _ |a English
100 1 _ |a Popescu, V.
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111 2 _ |a NIC Symposium 2016
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|d 2016-02-11 - 2016-02-12
|w Germany
245 _ _ |a Anisotropic Magneto-Thermopower in M/Co/M (M = Cu; Pd; Pt) Trilayer Systems
260 _ _ |a Jülich
|c 2016
|b Forschungszentrum Jülich GmbH, Zentralbibliothek
295 1 0 |a NIC Symposium 2016
300 _ _ |a 217-224
336 7 _ |a Contribution to a conference proceedings
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490 0 _ |a NIC Series
|v 48
520 _ _ |a Ab initio investigations performed within the framework of the spin-polarised relativistic Korringa-Kohn-Rostoker Green’s function method show that the longitudinal thermopower in the metallic M/Co/M systems (with M a non-magnetic transition metal) depends in a significant manner on the relative orientation (in-plane versus out-of-plane) of the sample magnetisation. As thermoelectric analogue of the conventional anisotropic magneto-resistance (AMR), the amplitude of this magneto-thermopower (MTP) signal is related to the asymmetry of the AMR around the Fermi energy. This asymmetry can be sizable, and thus the MTP accordingly large, even if the AMR itself is small. An enhancement of the MTP based on this understanding opens the possibility of implementing efficient spin read-out thermoelectric devices based on a single ferromagnetic layer. Our calculations reveal a rather non-intuitive behaviour of the MTP in the investigated systems, with the Pd/Co/Pd trilayer exhibiting an extremely small valued MTP, not necessarily expected from the monotonous increase of the spin-orbit coupling strength for the different heterostructure partners M = Cu; Pd; Pt.
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700 1 _ |a Kratzer, P.
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