Interplay of magnetism and transport in HoBi

H. Y. Yang; J. Gaudet; A. A. Aczel; D. E. Graf; P. Blaha; B. D. Gaulin; Fazel Tafti

doi:10.1103/PhysRevB.98.045136

Interplay of magnetism and transport in HoBi

H. Y. Yang, J. Gaudet, A. A. Aczel, D. E. Graf, P. Blaha, B. D. Gaulin, Fazel Tafti

Spectroscopy

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21 Scopus citations

Abstract

We report the observation of an extreme magnetoresistance (XMR) in HoBi with a large magnetic moment from Ho f electrons. Neutron scattering is used to determine the magnetic wave vectors across several metamagnetic transitions on the phase diagram of HoBi. Unlike other magnetic rare-earth monopnictides, the field dependence of resistivity in HoBi is nonmonotonic and reveals clear signatures of every metamagnetic transition in the low-temperature and low-field regime, at T<2 K and H<2.3 T. The XMR appears at H>2.3 T after all the metamagnetic transitions are complete and the system is spin polarized by the external magnetic field. The existence of an onset field for XMR and the intimate connection between magnetism and transport in HoBi are unprecedented among the magnetic rare-earth monopnictides. Therefore, HoBi provides a unique opportunity to understand the electrical transport in magnetic XMR semimetals.

Original language	English
Article number	045136
Journal	Physical Review B
Volume	98
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.98.045136
State	Published - Jul 27 2018

Funding

The work at Boston College was funded by National Science Foundation Award No. DMR-1708929. The work at McMater University was funded by NSERC of Canada. The National High Magnetic Field Laboratory is supported by National Science Foundation through NSF/DMR-1644779 and the State of Florida. A portion of this work used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by Oak Ridge National Laboratory.

Funders	Funder number
State of Florida
National Science Foundation
Natural Sciences and Engineering Research Council of Canada	NSF/DMR-1644779

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10.1103/PhysRevB.98.045136

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abstract = "We report the observation of an extreme magnetoresistance (XMR) in HoBi with a large magnetic moment from Ho f electrons. Neutron scattering is used to determine the magnetic wave vectors across several metamagnetic transitions on the phase diagram of HoBi. Unlike other magnetic rare-earth monopnictides, the field dependence of resistivity in HoBi is nonmonotonic and reveals clear signatures of every metamagnetic transition in the low-temperature and low-field regime, at T<2 K and H<2.3 T. The XMR appears at H>2.3 T after all the metamagnetic transitions are complete and the system is spin polarized by the external magnetic field. The existence of an onset field for XMR and the intimate connection between magnetism and transport in HoBi are unprecedented among the magnetic rare-earth monopnictides. Therefore, HoBi provides a unique opportunity to understand the electrical transport in magnetic XMR semimetals.",

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AU - Gaulin, B. D.

AU - Tafti, Fazel

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AB - We report the observation of an extreme magnetoresistance (XMR) in HoBi with a large magnetic moment from Ho f electrons. Neutron scattering is used to determine the magnetic wave vectors across several metamagnetic transitions on the phase diagram of HoBi. Unlike other magnetic rare-earth monopnictides, the field dependence of resistivity in HoBi is nonmonotonic and reveals clear signatures of every metamagnetic transition in the low-temperature and low-field regime, at T<2 K and H<2.3 T. The XMR appears at H>2.3 T after all the metamagnetic transitions are complete and the system is spin polarized by the external magnetic field. The existence of an onset field for XMR and the intimate connection between magnetism and transport in HoBi are unprecedented among the magnetic rare-earth monopnictides. Therefore, HoBi provides a unique opportunity to understand the electrical transport in magnetic XMR semimetals.

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Interplay of magnetism and transport in HoBi

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