Simultaneous control of the Dzyaloshinskii-Moriya interaction and magnetic anisotropy in nanomagnetic trilayers

Balk, Andrew; Kim, Kyoung-Whan; Pierce, Daniel T.; Stiles, Mark D.; Unguris, John; Stavis, Samuel M.

doi:10.1103/PhysRevLett.119.077205

Title: Simultaneous control of the Dzyaloshinskii-Moriya interaction and magnetic anisotropy in nanomagnetic trilayers

Journal Article · Thu Aug 17 00:00:00 EDT 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.119.077205· OSTI ID:1394972

Balk, Andrew ^[1]; Kim, Kyoung-Whan ^[2]; Pierce, Daniel T. ^[3]; Stiles, Mark D. ^[3]; Unguris, John ^[3]; Stavis, Samuel M. ^[3]

National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Nanoscale Science and Technology; Univ. of Maryland, College Park, MD (United States). Maryland NanoCenter; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Nanoscale Science and Technology; Univ. of Maryland, College Park, MD (United States). Maryland NanoCenter
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Nanoscale Science and Technology

Magneto-optical Kerr effect (MOKE) microscopy measurements of magnetic bubble domains demonstrate that Ar⁺ irradiation around 100 eV can tune the Dzyaloshinskii-Moriya interaction (DMI) in Pt/Co/Pt trilayers. Varying the irradiation energy and dose changes the DMI sign and magnitude separately from the magnetic anisotropy, allowing tuning of the DMI while holding the coercive field constant. This simultaneous control emphasizes the different physical origins of these effects. To accurately measure the DMI, we propose and apply a physical model for a poorly understood peak in domain wall velocity at zero in-plane field. Finally, the ability to tune the DMI with the spatial resolution of the Ar⁺ irradiation enables new fundamental investigations and technological applications of chiral nanomagnetics.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1394972

Report Number(s):: LA-UR-16-28412; TRN: US1702840

Journal Information:: Physical Review Letters, Vol. 119, Issue 7; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 42 works

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