Spin Seebeck effect in ɛ-Fe.sub.2./sub.O.sub.3./sub. thin films with high coercive field

0498199 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Knížek, Karel - Pashchenko, Mariia - Levinský, Petr - Kaman, Ondřej - Houdková, Jana - Jiříček, Petr - Hejtmánek, Jiří - Soroka, Miroslav - Buršík, Josef
Spin Seebeck effect in ɛ-Fe₂O₃ thin films with high coercive field.
Journal of Applied Physics. Roč. 124, č. 21 (2018), s. 1-8, č. článku 213904. ISSN 0021-8979. E-ISSN 1089-7550
Grant CEP: GA MŠMT(CZ) LM2015088; GA ČR GA16-04340S; GA MŠMT(CZ) LM2015073
Institucionální podpora: RVO:68378271 ; RVO:61388980
Klíčová slova: spin coating * magnetic hysteresis * thin films * depth profiling techniques * thermoelectricity
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.); Inorganic and nuclear chemistry (UACH-T)
Impakt faktor: 2.328, rok: 2018

We present the experimental observation of the spin Seebeck effect in ε-Fe2-xAlxO3 (x=0 and 0.3) thin films with Pt detection layer. The films with 40–70 nm thicknesses were deposited by a spin-coating method on Y:ZrO2(100) substrates. The prepared films are highly oriented with the easy magnetic a-axis parallel to the film surface. The magnetic hysteresis loops measured for x=0 at room temperature with the magnetic field parallel to the surface exhibit coercive fields up to 11.6 kOe, which is so far the highest value of ε-Fe2O3 thin films. The spin Seebeck signal for x=0 increases proportionally to the film's thickness, which means that the critical thickness corresponding to the magnon propagation length is greater than 70 nm.

Trvalý link: http://hdl.handle.net/11104/0290597