Interfacial ferromagnetism and atomic structures in high-temperature grown Fe3O4/Pt/Fe3O4 epitaxial trilayers

Kikkawa, T. ; Suzuki, M. ; Ramos, R. ; Aguirre, M.H. (Universidad de Zaragoza) ; Okabayashi, J. ; Uchida, K. ; Lucas, I. (Universidad de Zaragoza) ; Anadón, A. ; Kikuchi, D. ; Algarabel, P.A. (Universidad de Zaragoza) ; Morellón, L. (Universidad de Zaragoza) ; Ibarra, M.R. (Universidad de Zaragoza) ; Saitoh, E.

Resumen: Induced Pt ferromagnetism in Fe 3 O 4 / Pt / Fe 3 O 4 epitaxial trilayer films has been investigated by means of X-ray magnetic circular dichroism (XMCD) at the Pt L 3, 2-edges at various temperatures from 300 K to 12 K, including the metal-insulator transition temperature of Fe 3 O 4 (T V ~ 114 K). At all the temperatures, we observed clear XMCD signals due to Pt ferromagnetism, the amplitude of which was determined to be 0.39 µ B at 300 K and 0.52 µ B at 12 K for the sample with the Pt thickness of ~ 2 nm. Interestingly, these values are comparable to or even greater than those in Pt/3 d-ferromagnetic-metal (Fe, Ni, Co, and Ni 81 Fe 19) junction systems. The results can be interpreted in terms of a possible Fe interdiffusion into the Pt layer and also possible Fe-Pt alloying due to its high-temperature deposition.

Idioma: Inglés

DOI: 10.1063/1.5125761

Año: 2019

Publicado en: Journal of Applied Physics 126, 14 (2019), 143903 [11 pp.]
ISSN: 0021-8979

Factor impacto JCR: 2.286 (2019)

Categ. JCR: PHYSICS, APPLIED rank: 70 / 154 = 0.455 (2019) - Q2 - T2

Factor impacto SCIMAGO: 0.728 - Physics and Astronomy (miscellaneous) (Q2)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E26
Financiación: info:eu-repo/grantAgreement/EC/H2020/734187/EU/Spin conversion, logic storage in oxide-based electronics/SPICOLOST
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-82970-C2

Tipo y forma: Article (Published version)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)