Extrinsic Surface Magnetic Anisotropy Contribution in Pt/Y3Fe5O12 Interface in Longitudinal Spin Seebeck Effect by Graphene Interlayer

Autor:	No-Won Park, Gil-Sung Kim, Min-Sung Kang, Jin Hyuk Kim, Takashi Kikkawa, Keun Soo Kim, Sang-Kwon Lee, Suheon Lee, Kwang-Yong Choi, Young-Gui Yoon, Won-Yong Lee, Eiji Saitoh, Maeng-Je Seong
Rok vydání:	2021
Předmět:	Materials science Condensed matter physics Graphene Bilayer law.invention Condensed Matter::Materials Science Magnetization Magnetic anisotropy law Condensed Matter::Superconductivity Thermoelectric effect Diamagnetism General Materials Science Layer (electronics) Spin-½
Zdroj:	ACS Applied Materials & Interfaces. 13:45097-45104
ISSN:	1944-8252 1944-8244
DOI:	10.1021/acsami.1c13180
Popis:	A recent study found that magnetization curves for Y3Fe5O12 (YIG) slab and thick films (>20 μm thick) differed from bulk system curves by their longitudinal spin Seebeck effect in a Pt/YIG bilayer system. The deviation was due to intrinsic YIG surface magnetic anisotropy, which is difficult to adopt extrinsic surface magnetic anisotropy even when in contact with other materials on the YIG surface. This study experimentally demonstrates evidence for extrinsic YIG surface magnetic anisotropy when in contact with a diamagnetic graphene interlayer by observing the spin Seebeck effect, directly proving intrinsic YIG surface magnetic anisotropy interruption. We show the Pt/YIG bilayer system graphene interlayer role using large area single and multilayered graphenes using the longitudinal spin Seebeck effect at room temperature, and address the presence of surface magnetic anisotropy due to magnetic proximity between graphene and YIG layer. These findings suggest a promising route to understand new physics of spin Seebeck effect in spin transport.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1eb234fb989c51cc1ef01c0294a2304c https://doi.org/10.1021/acsami.1c13180 Zobrazit plný text záznamu