Novel Spin–Orbit Torque Generation at Room Temperature in an All–Oxide Epitaxial La0.7Sr0.3MnO3/SrIrO3 System

Huang, Xiaoxi; Sayed, Shehrin; Mittelstaedt, Joseph; Susarla, Sandhya; Karimeddiny, Saba; Caretta, Lucas; Zhang, Hongrui; Stoica, Vladimir A.; Gosavi, Tanay; Mahfouzi, Farzad; Sun, Qilong; Ercius, Peter; Kioussis, Nicholas; Salahuddin, Sayeef; Ralph, Daniel C.; Ramesh, Ramamoorthy

doi:10.1002/adma.202008269

Title: Novel Spin–Orbit Torque Generation at Room Temperature in an All–Oxide Epitaxial La_0.7Sr_0.3MnO₃/SrIrO₃ System

Journal Article · Fri May 07 00:00:00 EDT 2021 · Advanced Materials

DOI:https://doi.org/10.1002/adma.202008269· OSTI ID:1785273

^[1]; Sayed, Shehrin ^[1]; Mittelstaedt, Joseph ^[2]; Susarla, Sandhya ^[3]; Karimeddiny, Saba ^[2]; Caretta, Lucas ^[1]; Zhang, Hongrui ^[1]; Stoica, Vladimir A. ^[4]; Gosavi, Tanay ^[5]; Mahfouzi, Farzad ^[6]; Sun, Qilong ^[6]; Ercius, Peter ^[3]; Kioussis, Nicholas ^[6]; Salahuddin, Sayeef ^[1]; Ralph, Daniel C. ^[7]; Ramesh, Ramamoorthy ^[8]

Univ. of California, Berkeley, CA (United States)
Cornell Univ., Ithaca, NY (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Pennsylvania State Univ., University Park, PA (United States)
Intel Corporation, Hillsboro, OR (United States)
California State Univ, Northridge, CA (United States)
Cornell Univ., Ithaca, NY (United States); Kavli Inst. at Cornell for Nanoscale Science, Ithaca, NY (United States)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Spin-orbit torques (SOTs) that arise from materials with large spin-orbit coupling offer a new pathway for energy-efficient and fast magnetic information storage. SOTs in conventional heavy metals and topological insulators are explored extensively, while 5d transition metal oxides, which also host ions with strong spin-orbit coupling, are a relatively new territory in the field of spintronics. An all-oxide, SrTiO₃ (STO)//La_0.7 Sr_0.3 MnO₃ (LSMO)/SrIrO₃ (SIO) heterostructure with lattice-matched crystal structure is synthesized, exhibiting an epitaxial and atomically sharp interface between the ferromagnetic LSMO and the high spin-orbit-coupled metal SIO. Spin-torque ferromagnetic resonance (ST-FMR) is used to probe the effective magnetization and the SOT efficiency in LSMO/SIO heterostructures grown on STO substrates. Remarkably, epitaxial LSMO/SIO exhibits a large SOT efficiency, ξ_|| = 1, while retaining a reasonably low shunting factor and increasing the effective magnetization of LSMO by ≈50%. The findings highlight the significance of epitaxy as a powerful tool to achieve a high SOT efficiency, explore the rich physics at the epitaxial interface, and open up a new pathway for designing next-generation energy-efficient spintronic devices.

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Research Organization:: Cornell Univ., Ithaca, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0017671; AC02-06CH11357; DE‐AC02‐05CH11231; DE‐SC0017671; AC02-05CH11231

OSTI ID:: 1785273

Alternate ID(s):: OSTI ID: 1785886; OSTI ID: 1829692

Journal Information:: Advanced Materials, Vol. 33, Issue 24; ISSN 0935-9648

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Novel Spin–Orbit Torque Generation at Room Temperature in an All–Oxide Epitaxial La0.7Sr0.3MnO3/SrIrO3 System

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References (51)

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Title: Novel Spin–Orbit Torque Generation at Room Temperature in an All–Oxide Epitaxial La_0.7Sr_0.3MnO₃/SrIrO₃ System