In-plane Néel wall chirality and orientation of interfacial Dzyaloshinskii-Moriya vector in magnetic films

Robertson, MacCallum; Agostino, Christopher J.; Chen, Gong; Kang, Sang Pyo; Mascaraque, Arantzazu; Garcia Michel, Enrique; Won, Changyeon; Wu, Yizheng; Schmid, Andreas K.; Liu, Kai

doi:10.1103/physrevb.102.024417

Title: In-plane Néel wall chirality and orientation of interfacial Dzyaloshinskii-Moriya vector in magnetic films

Journal Article · Tue Jul 14 00:00:00 EDT 2020 · Physical Review B

DOI:https://doi.org/10.1103/physrevb.102.024417· OSTI ID:1650114

^[1];

^[2]; Chen, Gong ^[1]; Kang, Sang Pyo ^[3];

^[4];

^[5]; Won, Changyeon ^[3];

^[6]; Schmid, Andreas K. ^[7];

^[8]

Univ. of California, Davis, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry; Univ. of California, Berkeley, CA (United States); Indiana Univ., Bloomington, IN (United States)
Kyung Hee Univ., Seoul (South Korea)
Univ. Complutense de Madrid (Spain); Unidad Asociada IQFR(CSIC)-UCM
Univ. Autonoma de Madrid (Spain)
Fudan Univ., Shanghai (China). State Key Lab. of Surface Physics, Advanced Materials Lab.
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
Univ. of California, Davis, CA (United States); Georgetown Univ., Washington, DC (United States)

The interfacial Dzyaloshinskii-Moriya interaction (DMI) is of great interest as it can stabilize chiral spin structures in thin films. Experiments verifying the orientation of the interfacial DMI vector remain rare, in part due to the difficulty of separating vector components of DMI. In this study, Fe/Ni bilayers and Co/Ni multilayers were deposited epitaxially onto Cu(001) and Pt(111) substrates, respectively. By tailoring the effective anisotropy, spin reorientation transitions (SRTs) are employed to probe the orientation of the DMI vector by measuring the spin structure of domain walls on both sides of the SRTs. In our results, the interfacial DMI is found to be sufficiently strong to stabilize chiral Néel walls in the out-of-plane magnetized regimes, while achiral Néel walls are observed in the in-plane magnetized regimes. Furthermore, these findings experimentally confirm that the out-of-plane component of the DMI vector is insignificant in these fcc(001) and fcc(111) oriented interfaces, even in the presence of atomic steps.

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Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); National Science Foundation (NSF); National Research Foundation of Korea (NRF); SMART; Ministry of Economic Affairs and Digital Transformation of Spain (MINECO); MICINN; MECD

Grant/Contract Number:: AC02-05CH11231; DMR-1610060; DMR-1905468; MRP-17-454963; 2018-NE-2861; 2018R1D1A1B07047114; FIS2017-82415-R; PRX17/00557; 11974079; 11734006

OSTI ID:: 1650114

Journal Information:: Physical Review B, Vol. 102, Issue 2; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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