Exploring the mechanism of the photo-excited spin currents in W/Y3Fe5O12 heterostructure

Hongru Wang; Jing Meng; Pengsheng Guo; Hai Ma; Yucheng Kan; Rui Chen; Mingyue Long; Lujun Huang; Ye Chen; Junhao Chu; Yu Ning Wu; Lin Sun

doi:10.1016/j.apsusc.2025.162779

Exploring the mechanism of the photo-excited spin currents in W/Y₃Fe₅O₁₂ heterostructure

Hongru Wang
, Jing Meng
, Pengsheng Guo
, Hai Ma
, Yucheng Kan
, Rui Chen
, Mingyue Long
, Lujun Huang
, Ye Chen
, Junhao Chu
, Yu Ning Wu^*
, Lin Sun

^*Corresponding author for this work

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

Abstract

The spin photovoltaic effect (SPVE) is anticipated to generate pure spin current under light in a contactless way. We systematically investigate the SPVE of Y₃Fe₅O₁₂ (YIG) with different thicknesses in W/YIG heterostructures under different laser wavelengths. The SPVE signal decreases with reducing the thickness of YIG (l_YIG) and it approaches to zero when l_YIG < 10 nm. In the representative W/YIG (350 nm) sample, the SPVE signal increases with increasing wavelength. Compared with short-wavelength laser, long-wavelength laser can maintain higher and more uniform energy distribution in YIG, thereby more efficiently exciting spin waves. Our results indicate that the SPVE is mainly dominated by the bulk mechanism rather than the interface mechanism induced by the magnetic proximity effects. This work offers a comprehensive analysis of the SPVE mechanism, laying a solid foundation for the development of SPVE prototype devices.

Original language	English
Article number	162779
Journal	Applied Surface Science
Volume	692
DOIs	https://doi.org/10.1016/j.apsusc.2025.162779
State	Published - 30 May 2025

Keywords

Magnetic proximity effect
Spin currents
Spin photovoltaic effect
W/YIG

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.apsusc.2025.162779

Cite this

@article{72185c52ec5940698975789525bb11df,

title = "Exploring the mechanism of the photo-excited spin currents in W/Y3Fe5O12 heterostructure",

abstract = "The spin photovoltaic effect (SPVE) is anticipated to generate pure spin current under light in a contactless way. We systematically investigate the SPVE of Y3Fe5O12 (YIG) with different thicknesses in W/YIG heterostructures under different laser wavelengths. The SPVE signal decreases with reducing the thickness of YIG (lYIG) and it approaches to zero when lYIG < 10 nm. In the representative W/YIG (350 nm) sample, the SPVE signal increases with increasing wavelength. Compared with short-wavelength laser, long-wavelength laser can maintain higher and more uniform energy distribution in YIG, thereby more efficiently exciting spin waves. Our results indicate that the SPVE is mainly dominated by the bulk mechanism rather than the interface mechanism induced by the magnetic proximity effects. This work offers a comprehensive analysis of the SPVE mechanism, laying a solid foundation for the development of SPVE prototype devices.",

keywords = "Magnetic proximity effect, Spin currents, Spin photovoltaic effect, W/YIG",

author = "Hongru Wang and Jing Meng and Pengsheng Guo and Hai Ma and Yucheng Kan and Rui Chen and Mingyue Long and Lujun Huang and Ye Chen and Junhao Chu and Wu, \{Yu Ning\} and Lin Sun",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier B.V.",

year = "2025",

month = may,

day = "30",

doi = "10.1016/j.apsusc.2025.162779",

language = "英语",

volume = "692",

journal = "Applied Surface Science",

issn = "0169-4332",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Exploring the mechanism of the photo-excited spin currents in W/Y3Fe5O12 heterostructure

AU - Wang, Hongru

AU - Meng, Jing

AU - Guo, Pengsheng

AU - Ma, Hai

AU - Kan, Yucheng

AU - Chen, Rui

AU - Long, Mingyue

AU - Huang, Lujun

AU - Chen, Ye

AU - Chu, Junhao

AU - Wu, Yu Ning

AU - Sun, Lin

PY - 2025/5/30

Y1 - 2025/5/30

N2 - The spin photovoltaic effect (SPVE) is anticipated to generate pure spin current under light in a contactless way. We systematically investigate the SPVE of Y3Fe5O12 (YIG) with different thicknesses in W/YIG heterostructures under different laser wavelengths. The SPVE signal decreases with reducing the thickness of YIG (lYIG) and it approaches to zero when lYIG < 10 nm. In the representative W/YIG (350 nm) sample, the SPVE signal increases with increasing wavelength. Compared with short-wavelength laser, long-wavelength laser can maintain higher and more uniform energy distribution in YIG, thereby more efficiently exciting spin waves. Our results indicate that the SPVE is mainly dominated by the bulk mechanism rather than the interface mechanism induced by the magnetic proximity effects. This work offers a comprehensive analysis of the SPVE mechanism, laying a solid foundation for the development of SPVE prototype devices.

AB - The spin photovoltaic effect (SPVE) is anticipated to generate pure spin current under light in a contactless way. We systematically investigate the SPVE of Y3Fe5O12 (YIG) with different thicknesses in W/YIG heterostructures under different laser wavelengths. The SPVE signal decreases with reducing the thickness of YIG (lYIG) and it approaches to zero when lYIG < 10 nm. In the representative W/YIG (350 nm) sample, the SPVE signal increases with increasing wavelength. Compared with short-wavelength laser, long-wavelength laser can maintain higher and more uniform energy distribution in YIG, thereby more efficiently exciting spin waves. Our results indicate that the SPVE is mainly dominated by the bulk mechanism rather than the interface mechanism induced by the magnetic proximity effects. This work offers a comprehensive analysis of the SPVE mechanism, laying a solid foundation for the development of SPVE prototype devices.

KW - Magnetic proximity effect

KW - Spin currents

KW - Spin photovoltaic effect

KW - W/YIG

UR - https://www.scopus.com/pages/publications/85218356776

U2 - 10.1016/j.apsusc.2025.162779

DO - 10.1016/j.apsusc.2025.162779

M3 - 文章

AN - SCOPUS:85218356776

SN - 0169-4332

VL - 692

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 162779

ER -