Competing magnetic phases and fluctuation-driven scalar spin chirality in the kagome metal YMn6Sn6

Nirmal J. Ghimire; Rebecca L. Dally; L. Poudel; D. C. Jones; D. Michel; N. Thapa Magar; M. Bleuel; Michael A. McGuire; J. S. Jiang; J. F. Mitchell; Jeffrey W. Lynn; I. I. Mazin

doi:10.1126/SCIADV.ABE2680

Competing magnetic phases and fluctuation-driven scalar spin chirality in the kagome metal YMn₆Sn₆

Nirmal J. Ghimire, Rebecca L. Dally, L. Poudel, D. C. Jones, D. Michel, N. Thapa Magar, M. Bleuel, Michael A. McGuire, J. S. Jiang, J. F. Mitchell, Jeffrey W. Lynn, I. I. Mazin

Correlated Electron Materials

Research output: Contribution to journal › Article › peer-review

131 Scopus citations

Abstract

Identification, understanding, and manipulation of novel magnetic textures are essential for the discovery of new quantum materials for future spin-based electronic devices. In particular, materials that manifest a large response to external stimuli such as a magnetic field are subject to intense investigation. Here, we study the kagome-net magnet YMn₆Sn₆ by magnetometry, transport, and neutron diffraction measurements combined with first-principles calculations. We identify a number of nontrivial magnetic phases, explain their microscopic nature, and demonstrate that one of them hosts a large topological Hall effect (THE). We propose a previously unidentified fluctuation-driven mechanism, which leads to the THE at elevated temperatures. This interesting physics comes from parametrically frustrated interplanar exchange interactions that trigger strong magnetic fluctuations. Our results pave a path to chiral spin textures, promising for novel spintronics.

Original language	English
Article number	eabe2680
Journal	Science Advances
Volume	6
Issue number	51
DOIs	https://doi.org/10.1126/SCIADV.ABE2680
State	Published - Dec 2020

Funding

N.J.G. and I.I.M. acknowledge start-up funding from George Mason University. I.I.M. additionally acknowledges support from the U.S. Department of Energy through the grant #DE-SC0021089. Work in the Materials Science Division at Argonne National Laboratory (J.F.M. and J.S.J.) was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Science, and Engineering Division. Work at ORNL (M.A.M.) was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences, and Engineering Division. The identification of any commercial product or trade name does not imply endorsement or recommendation by the National Institute of Standards and Technology.

Funders	Funder number
Materials Science Division
Materials Science, and Engineering Division
Materials Sciences
U.S. Department of Energy	-SC0021089
National Institute of Standards and Technology
Office of Science
Basic Energy Sciences
Argonne National Laboratory
Oak Ridge National Laboratory
George Mason University

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title = "Competing magnetic phases and fluctuation-driven scalar spin chirality in the kagome metal YMn6Sn6",

abstract = "Identification, understanding, and manipulation of novel magnetic textures are essential for the discovery of new quantum materials for future spin-based electronic devices. In particular, materials that manifest a large response to external stimuli such as a magnetic field are subject to intense investigation. Here, we study the kagome-net magnet YMn6Sn6 by magnetometry, transport, and neutron diffraction measurements combined with first-principles calculations. We identify a number of nontrivial magnetic phases, explain their microscopic nature, and demonstrate that one of them hosts a large topological Hall effect (THE). We propose a previously unidentified fluctuation-driven mechanism, which leads to the THE at elevated temperatures. This interesting physics comes from parametrically frustrated interplanar exchange interactions that trigger strong magnetic fluctuations. Our results pave a path to chiral spin textures, promising for novel spintronics.",

author = "Ghimire, {Nirmal J.} and Dally, {Rebecca L.} and L. Poudel and Jones, {D. C.} and D. Michel and {Thapa Magar}, N. and M. Bleuel and McGuire, {Michael A.} and Jiang, {J. S.} and Mitchell, {J. F.} and Lynn, {Jeffrey W.} and Mazin, {I. I.}",

note = "Publisher Copyright: Copyright {\textcopyright} 2020 The Authors, some rights reserved.",

year = "2020",

month = dec,

doi = "10.1126/SCIADV.ABE2680",

language = "English",

volume = "6",

journal = "Science Advances",

issn = "2375-2548",

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AU - Ghimire, Nirmal J.

AU - Dally, Rebecca L.

AU - Poudel, L.

AU - Jones, D. C.

AU - Michel, D.

AU - Thapa Magar, N.

AU - Bleuel, M.

AU - McGuire, Michael A.

AU - Jiang, J. S.

AU - Mitchell, J. F.

AU - Lynn, Jeffrey W.

AU - Mazin, I. I.

PY - 2020/12

Y1 - 2020/12

N2 - Identification, understanding, and manipulation of novel magnetic textures are essential for the discovery of new quantum materials for future spin-based electronic devices. In particular, materials that manifest a large response to external stimuli such as a magnetic field are subject to intense investigation. Here, we study the kagome-net magnet YMn6Sn6 by magnetometry, transport, and neutron diffraction measurements combined with first-principles calculations. We identify a number of nontrivial magnetic phases, explain their microscopic nature, and demonstrate that one of them hosts a large topological Hall effect (THE). We propose a previously unidentified fluctuation-driven mechanism, which leads to the THE at elevated temperatures. This interesting physics comes from parametrically frustrated interplanar exchange interactions that trigger strong magnetic fluctuations. Our results pave a path to chiral spin textures, promising for novel spintronics.

AB - Identification, understanding, and manipulation of novel magnetic textures are essential for the discovery of new quantum materials for future spin-based electronic devices. In particular, materials that manifest a large response to external stimuli such as a magnetic field are subject to intense investigation. Here, we study the kagome-net magnet YMn6Sn6 by magnetometry, transport, and neutron diffraction measurements combined with first-principles calculations. We identify a number of nontrivial magnetic phases, explain their microscopic nature, and demonstrate that one of them hosts a large topological Hall effect (THE). We propose a previously unidentified fluctuation-driven mechanism, which leads to the THE at elevated temperatures. This interesting physics comes from parametrically frustrated interplanar exchange interactions that trigger strong magnetic fluctuations. Our results pave a path to chiral spin textures, promising for novel spintronics.

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Competing magnetic phases and fluctuation-driven scalar spin chirality in the kagome metal YMn₆Sn₆

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