Topological magnetoresistance of magnetic skyrmionic bubbles

Author:

Li Fei123ORCID,Nie Hao134ORCID,Zhao Yu134ORCID,Zhao Zhihe12,Huo Juntao5ORCID,Wang Tianyang6,Liao Zhaoliang6ORCID,Liu Andi78,Guo Hanjie8ORCID,Shen Hongxian13ORCID,Jiang Sida4,Chen Renjie2,Yan Aru2,Cheong S.-W.9ORCID,Xia Weixing2ORCID,Sun Jianfei13ORCID,Zhang Lunyong13ORCID

Affiliation:

1. School of Materials Science and Engineering, Harbin Institute of Technology 1 , Harbin 150001, China

2. CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Science 2 , Ningbo 315201, China

3. National Key Laboratory of Precision Hot Processing of Metals, Harbin Institute of Technology 3 , Harbin 150001, China

4. Space Environment Simulation Research Infrastructure, Harbin Institute of Technology 4 , Harbin 150001, China

5. Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, CAS 5 , Ningbo 315201, China

6. National Synchrotron Radiation Laboratory, University of Science and Technology of China 6 , Hefei 230026, China

7. Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology 7 , Wuhan, Hubei 430074, China

8. Songshan Lake Materials Laboratory 8 , Dongguan, Guangdong 523808, China

9. Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University 9 , 136 Frelinghuysen Rd., Piscataway, New Jersey 08854, USA

Abstract

Magnetic skyrmions offer promising prospects for constructing future energy-efficient and high-density information technology, leading to extensive explorations of new skyrmionic materials recently. The topological Hall effect has been widely adopted as a distinctive marker of skyrmion emergence. Alternately, here we propose a novel signature of skyrmion state by quantitatively investigating the magnetoresistance (MR) induced by skyrmionic bubbles in CeMn2Ge2. An intriguing finding was revealed: the anomalous MR measured at different temperatures can be normalized into a single curve, regardless of sample thickness. This behavior can be accurately reproduced by the recent chiral spin textures MR model. Further analysis of the MR anomaly allowed us to quantitatively examine the effective magnetic fields of various scattering channels. Remarkably, the analyses, combined with the Lorentz transmission electron microscopy results, indicate that the in-plane scattering channel with triplet exchange interactions predominantly governs the magnetotransport in the Bloch-type skyrmionic bubble state. Our results not only provide insights into the quantum correction on MR induced by skyrmionic bubble phase, but also present an electrical probing method for studying chiral spin texture formation, evolution, and their topological properties, which opens up exciting possibilities for identifying new skyrmionic materials and advancing the methodology for studying chiral spin textures.

Funder

the Funds of National Key Laboratory for Precision Hot Forming of Metals

the "Head Goose" project of Heilongjiang Province

the Fundamentals Research Funds for the Central Universities

the Ningbo Key Scientific and Technological Project

Publisher

AIP Publishing

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