Spin Seebeck effect in epsilon-Fe2O3 thin films with high coercive field
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10389562" target="_blank" >RIV/00216208:11310/18:10389562 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1063/1.5045304" target="_blank" >https://doi.org/10.1063/1.5045304</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.5045304" target="_blank" >10.1063/1.5045304</a>
Alternative languages
Result language
angličtina
Original language name
Spin Seebeck effect in epsilon-Fe2O3 thin films with high coercive field
Original language description
We present the experimental observation of the spin Seebeck effect in epsilon-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 epsilon-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. Al substitution enhances the spin Seebeck signal, while it reduces the coercive field. The shape and coercive field of the spin Seebeck hysteresis loops closely resemble magnetization loops for single phase samples. A difference is encountered in the case of films with a small amount (1-2 vol. %) of secondary soft ferrimagnetic phase, where their presence is revealed in the magnetization loops by a constricted shape, in contrast to the spin Seebeck loops, where no constriction is observed. The large coercive field makes doped e-Fe2O3 a suitable material for applications of the spin Seebeck effect without an external magnetic field.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
Project
<a href="/en/project/GA16-04340S" target="_blank" >GA16-04340S: Oxide nanomagnets, their properties and interactions with biological systems</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Applied Physics
ISSN
0021-8979
e-ISSN
—
Volume of the periodical
124
Issue of the periodical within the volume
21
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
—
UT code for WoS article
000452538100015
EID of the result in the Scopus database
2-s2.0-85058113744