Magnetism and spin-dependent transport phenomena across Verwey and Morin transitions in iron oxide/Pt bilayers

Chanda, Amit; Hung, Chang-Ming; Duong, Anh Tuan; Cho, Sunglae; Srikanth, Hariharan; Phan, Manh-Huong

doi:10.1016/j.jmmm.2023.170370

Magnetism and spin-dependent transport phenomena across Verwey and Morin transitions in iron oxide/Pt bilayers

Journal Article · Wed Jan 11 00:00:00 EST 2023 · Journal of Magnetism and Magnetic Materials

DOI:https://doi.org/10.1016/j.jmmm.2023.170370· OSTI ID:2419220

Chanda, Amit ^[1]; Hung, Chang-Ming ^[2]; Duong, Anh Tuan ^[3]; Cho, Sunglae ^[4]; Srikanth, Hariharan ^[2]; Phan, Manh-Huong ^[2]

Univ. of South Florida, Tampa, FL (United States); OSTI
Univ. of South Florida, Tampa, FL (United States)
Phenikaa University, Yen Nghia (Vietnam)
Univ. of Ulsan (Korea, Republic of)

Understanding the influence of phase coexistence and phase transitions on spin transport properties in a ferromagnet/heavy metal (FM/HM) system is of utmost importance for spintronics. Here, we report a comprehensive investigation of the magnetic and spin transport properties of biphase iron oxide (BPIO = α-Fe₂O₃+Fe₃O₄)/Pt films over a wide temperature range, 10K ≤ T ≤ 300K. In-plane (IP) and out-of-plane (OOP) magnetometry and radio frequency transverse susceptibility measurements confirm the characteristic features of the Verwey and Morin transitions at T_V ~ 120K and TM ~ 200 K, respectively. Further, anisotropic magnetoresistance (AMR) is observed in the BPIO film, which arises mainly from the spin polarized tunneling of conduction electrons between neighboring uniformly magnetized grains through the resistive grain boundary. Spin Hall magnetoresistance (SMR) and spin Hall anomalous Hall effect (SH-AHE) are detected in the BPIO/Pt films. Around the T_V, the temperature evolution of SMR shows a sharp maximum, while SH-AHE exhibits a steep decrease. Both SMR and SH-AHE are strongly susceptible to the Verwey transition but the Morin transition, indicating that the interfacial magnetism of our BPIO/Pt film is dominated by the Fe₃O₄ phase rather than the α-Fe₂O₃ phase.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of South Florida, Tampa, FL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: FG02-07ER46438

OSTI ID:: 2419220

Alternate ID(s):: OSTI ID: 1914351

Journal Information:: Journal of Magnetism and Magnetic Materials, Journal Name: Journal of Magnetism and Magnetic Materials Journal Issue: C Vol. 568; ISSN 0304-8853

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
Anomalous Hall Effect (AHE)
Biphase iron oxide
Magnetic anisotropy
Spin Hall Anomalous Hall Effect (SH-AHE)
Spin Hall magnetoresistance (SMR)

Magnetism and spin-dependent transport phenomena across Verwey and Morin transitions in iron oxide/Pt bilayers

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