Optimization of YIG/Bi stacks for spin-to-charge conversion and influence of aging

Sangiao Barral, Soraya (Universidad de Zaragoza) ; Morales Aragonés, José Ignacio ; Lucas del Pozo, Irene (Universidad de Zaragoza) ; Jiménez Cavero, Pilar ; Morellón Alquézar, Luis (Universidad de Zaragoza) ; Sánchez Azqueta, Carlos (Universidad de Zaragoza) ; De Teresa Nogueras, José María (Universidad de Zaragoza)

Resumen: We show that an optimized growth of magnetic layer/non-magnetic layer stacks allows for the improvement of the spin-to-charge conversion efficiency. From the analysis of the voltage signal generated in spin pumping experiments due to the inverse spin Hall effect (ISHE) on Y3Fe5O12 (YIG)/Bi stacks, we have determined values for the spin Hall angle and the spin-diffusion length in Bi of 0.0068(8) and 17.8(9) nm, respectively. Based on these results, we have also studied the
influence of aging on the spin-to-charge conversion efficiency by performing spin pumping experiments on YIG/Bi stacks after exposing the samples to ambient conditions for several days and up to 150 days. We have found that in YIG/Bi samples with Bi thicknesses around or below the spin-diffusion length, the ISHE voltage signal is still above 80% of its initial value after 100 days.

Idioma: Inglés

DOI: 10.1088/1361-6463/ac0ca5

Año: 2021

Publicado en: JOURNAL OF PHYSICS D-APPLIED PHYSICS 54, 37 (2021), 375305 [7 pp.]
ISSN: 0022-3727

Factor impacto JCR: 3.409 (2021)

Categ. JCR: PHYSICS, APPLIED rank: 61 / 161 = 0.379 (2021) - Q2 - T2

Factor impacto CITESCORE: 5.7 - Physics and Astronomy (Q1) - Materials Science (Q1)

Factor impacto SCIMAGO: 0.717 - Acoustics and Ultrasonics (Q1) - Surfaces, Coatings and Films (Q1) - Electronic, Optical and Magnetic Materials (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/E13-20R
Financiación: info:eu-repo/grantAgreement/ES/MEC/FPU014-02546
Financiación: info:eu-repo/grantAgreement/ES/MICINN/MAT2017-82970-C2-1-R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/MAT2017-82970-C2-2-R

Tipo y forma: Article (PostPrint)

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