Spin Seebeck effect in Y-type hexagonal ferrite thin films
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F17%3A00313318" target="_blank" >RIV/68407700:21340/17:00313318 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/17:00483867 RIV/61388980:_____/17:00483867
Result on the web
<a href="https://doi.org/10.1103/PhysRevB.96.064428" target="_blank" >https://doi.org/10.1103/PhysRevB.96.064428</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.96.064428" target="_blank" >10.1103/PhysRevB.96.064428</a>
Alternative languages
Result language
angličtina
Original language name
Spin Seebeck effect in Y-type hexagonal ferrite thin films
Original language description
The longitudinal spin Seebeck effect (SSE) has been investigated using Pt/ferrite bilayers employing two Y-hexagonal ferrites Ba2Zn2Fe12O22 (Zn2Y) and Ba2Co2Fe12O22 (Co2Y) deposited by a spin-coating method on SrTiO3(111) substrates. The prepared hexagonal ferrites are highly oriented with c axes perpendicular to the substrate plane. The room-temperature magnetic moments of both ferrimagnetic ferrites amount to similar values and, most importantly, both have easy magnetization normal to the c axis. Despite their similar magnetic response the notable SSE signal is only observed for Zn2Y whereas the SSE signal of Co2Y is below the experimental noise level. A plausible explanation for this surprising discrepancy is magnetic disorder induced by cobalt cations, the random distribution of which in the Co2Y ferrite structure might critically limit the spin-wave propagation. This results in suppression of the SSE signal in Co2Y, while the Zn2Y with nonmagnetic substituent exhibits significant SSE signal. The temperature dependence of SSE for Zn2Y was measured over the 30–300 K range and quantitatively analyzed considering the heat flow through the Pt/Zn2Y bilayer and thermal gradient across the Zn2Y thin layer as the most relevant parameters. Using this approach the normalized SSE smoothly increases with lowering temperature, which correlates to increasing magnon propagation length and magnetization with decreasing temperature.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PHYSICAL REVIEW B
ISSN
2469-9950
e-ISSN
2469-9969
Volume of the periodical
96
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
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UT code for WoS article
000408197400004
EID of the result in the Scopus database
2-s2.0-85028725728