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Li X, Collignon C, Xu L, Zuo H, Cavanna A, Gennser U, Mailly D, Fauqué B, Balents L, Zhu Z, Behnia K. Chiral domain walls of Mn 3Sn and their memory. Nat Commun 2019; 10:3021. [PMID: 31289269 PMCID: PMC6616569 DOI: 10.1038/s41467-019-10815-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 06/04/2019] [Indexed: 11/09/2022] Open
Abstract
Magnetic domain walls are topological solitons whose internal structure is set by competing energies which sculpt them. In common ferromagnets, domain walls are known to be of either Bloch or Néel types. Little is established in the case of Mn3Sn, a triangular antiferromagnet with a large room-temperature anomalous Hall effect, where domain nucleation is triggered by a well-defined threshold magnetic field. Here, we show that the domain walls of this system generate an additional contribution to the Hall conductivity tensor and a transverse magnetization. The former is an electric field lying in the same plane with the magnetic field and electric current and therefore a planar Hall effect. We demonstrate that in-plane rotation of spins inside the domain wall would explain both observations and the clockwise or anticlockwise chirality of the walls depends on the history of the field orientation and can be controlled.
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Affiliation(s)
- Xiaokang Li
- Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China
- Laboratoire de Physique et d'Etude de Matériaux (CNRS), ESPCI Paris, PSL Research University, 75005, Paris, France
| | - Clément Collignon
- Laboratoire de Physique et d'Etude de Matériaux (CNRS), ESPCI Paris, PSL Research University, 75005, Paris, France
- JEIP (USR 3573 CNRS), Collège de France, 75005, Paris, France
| | - Liangcai Xu
- Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Huakun Zuo
- Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Antonella Cavanna
- Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay, 91120, Palaiseau, France
| | - Ulf Gennser
- Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay, 91120, Palaiseau, France
| | - Dominique Mailly
- Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay, 91120, Palaiseau, France
| | - Benoît Fauqué
- JEIP (USR 3573 CNRS), Collège de France, 75005, Paris, France
| | - Leon Balents
- Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA, 93106, USA
| | - Zengwei Zhu
- Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China.
| | - Kamran Behnia
- Laboratoire de Physique et d'Etude de Matériaux (CNRS), ESPCI Paris, PSL Research University, 75005, Paris, France.
- II. Physikalisches Institut, Universität zu Köln, 50937, Köln, Germany.
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