Tunable Neel-Bloch Magnetic Twists in Fe3GeTe2 with van der Waals Structure

被引：51

作者：

Peng, Licong ^{[1
]}

Yasin, Fehmi S. ^{[1
]}

Park, Tae-Eon ^{[2
]}

Kim, Sung Jong ^{[2
,3
]}

Zhang, Xichao ^{[4
]}

Nagai, Takuro ^{[5
]}

Kimoto, Koji ^{[5
]}

Woo, Seonghoon ^{[6
]}

Yu, Xiuzhen ^{[1
]}

机构：

[1] RIKEN Ctr Emergent Matter Sci, Wako, Saitama 3510198, Japan

[2] Korea Inst Sci & Technol, Ctr Spintron, Seoul 02792, South Korea

[3] Korea Univ, KU KIST Grad Sch Converging Sci & Technol, Seoul 02841, South Korea

[4] Shinshu Univ, Dept Elect & Comp Engn, Nagano 3808553, Japan

[5] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[6] IBM TJ Watson Res Ctr, New York, NY 10598 USA

来源：

ADVANCED FUNCTIONAL MATERIALS | 2021年 / 31卷 / 37期

基金：

日本科学技术振兴机构;

关键词：

Fe; 3GeTe; (2); magnetic skyrmion; Neel-Bloch twists; Van der Waals; SKYRMION; PHASE;

D O I：

10.1002/adfm.202103583

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The advent of ferromagnetism in 2D van der Waals (vdW) magnets has stimulated high interest in exploring topological magnetic textures, such as skyrmions for use in future skyrmion-based spintronic devices. To engineer skyrmions in vdW magnets by transforming Bloch-type magnetic bubbles into Neel-type skyrmions, a heavy metal/vdW magnetic thin film heterostructure has been made to induce interfacial Dzyaloshinskii-Moriya interaction (DMI). However, the unambiguous identification of the magnetic textures inherent to vdW magnets, for example, whether the magnetic twists (skyrmions/domain walls) are Neel- or Bloch-type, is unclear. Here we demonstrate that the magnetic twists can be tuned between Neel and Bloch-type in the vdW magnet Fe3GeTe2 (FGT) with/without interfacial DMI. We use an in-plane magnetic field to align the modulation wavevector q of the magnetizations in order to distinguish the Neel- or Bloch-type magnetic twists. We observe that q is perpendicular to the in-plane field in the heterostructure (Pt/oxidized-FGT/FGT/oxidized-FGT), while q aligns at a rotated angle with respect to the field direction in the FGT thin plate thinned from bulk. We find that the aligned domain wall twists hold fan-like modulations, coinciding qualitatively with our computational results.

引用

页数：7

共 24 条

[1] Magnetic skyrmions in atomic thin CrI3 monolayer [J].

Behera, Aroop K. ;

Chowdhury, Sugata ;

Das, Suprem R. .

APPLIED PHYSICS LETTERS, 2019, 114 (23)

[2] Real-space imaging of confined magnetic skyrmion tubes [J].

Birch, M. T. ;

Cortes-Ortuno, D. ;

Turnbull, L. A. ;

Wilson, M. N. ;

Gross, F. ;

Traeger, N. ;

Laurenson, A. ;

Bukin, N. ;

Moody, S. H. ;

Weigand, M. ;

Schuetz, G. ;

Popescu, H. ;

Fan, R. ;

Steadman, P. ;

Verezhak, J. A. T. ;

Balakrishnan, G. ;

Loudon, J. C. ;

Twitchett-Harrison, A. C. ;

Hovorka, O. ;

Fangohr, H. ;

Grin, F. Y. ;

Graefe, J. ;

Hatton, P. D. .

NATURE COMMUNICATIONS, 2020, 11 (01)

[3] Gate-tunable room-temperature ferromagnetism in two-dimensional Fe3GeTe2 [J].

Deng, Yujun ;

Yu, Yijun ;

Song, Yichen ;

Zhang, Jingzhao ;

Wang, Nai Zhou ;

Sun, Zeyuan ;

Yi, Yangfan ;

Wu, Yi Zheng ;

Wu, Shiwei ;

Zhu, Junyi ;

Wang, Jing ;

Chen, Xian Hui ;

Zhang, Yuanbo .

NATURE, 2018, 563 (7729) :94-+

[4] Observation of Magnetic Skyrmion Bubbles in a van der Waals Ferromagnet Fe3GeTe2 [J].

Ding, Bei ;

Li, Zefang ;

Xu, Guizhou ;

Li, Hang ;

Hou, Zhipeng ;

Liu, Enke ;

Xi, Xuekui ;

Xu, Feng ;

Yao, Yuan ;

Wang, Wenhong .

NANO LETTERS, 2020, 20 (02) :868-873

[5] Topological Magnetic-Spin Textures in Two-Dimensional van der Waals Cr2Ge2Te6 [J].

Han, Myung-Geun ;

Garlow, Joseph A. ;

Liu, Yu ;

Zhang, Huiqin ;

Li, Jun ;

DiMarzio, Donald ;

Knight, Mark W. ;

Petrovic, Cedomir ;

Jariwala, Deep ;

Zhu, Yimei .

NANO LETTERS, 2019, 19 (11) :7859-7865

[6] Layer-dependent ferromagnetism in a van der Waals crystal down to the monolayer limit [J].

Huang, Bevin ;

Clark, Genevieve ;

Navarro-Moratalla, Efren ;

Klein, Dahlia R. ;

Cheng, Ran ;

Seyler, Kyle L. ;

Zhong, Ding ;

Schmidgall, Emma ;

McGuire, Michael A. ;

Cobden, David H. ;

Yao, Wang ;

Xiao, Di ;

Jarillo-Herrero, Pablo ;

Xu, Xiaodong .

NATURE, 2017, 546 (7657) :270-+

[7] Phase measurement of atomic resolution image using transport of intensity equation [J].

Ishizuka, K ;

Allman, B .

JOURNAL OF ELECTRON MICROSCOPY, 2005, 54 (03) :191-197

[8] Probing magnetism in 2D van der Waals crystalline insulators via electron tunneling [J].

Klein, D. R. ;

MacNeill, D. ;

Lado, J. L. ;

Soriano, D. ;

Navarro-Moratalla, E. ;

Watanabe, K. ;

Taniguchi, T. ;

Manni, S. ;

Canfield, P. ;

Fernandez-Rossier, J. ;

Jarillo-Herrero, P. .

SCIENCE, 2018, 360 (6394) :1218-+

[9] Elusive Dzyaloshinskii-Moriya interaction in monolayer Fe3GeTe2 [J].

Laref, Slimane ;

Kim, Kyoung-Whan ;

Manchon, Aurelien .

PHYSICAL REVIEW B, 2020, 102 (06)

[10] Skyrmion robustness in noncentrosymmetric magnets with axial symmetry: The role of anisotropy and tilted magnetic fields [J].

Leonov, A. O. ;

Kezsmarki, I. .

PHYSICAL REVIEW B, 2017, 96 (21)

← 1 2 3 →