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Evolution of incommensurate spin order with magnetic field and temperature in the itinerant antiferromagnet GdSi

Feng, Yejun and Silevitch, D. M. and Wang, Jiyang and Palmer, A. and Woo, Nayoon and Yan, J.-Q. and Islam, Z. and Suslov, A. V. and Littlewood, P. B. and Rosenbaum, T. F. (2013) Evolution of incommensurate spin order with magnetic field and temperature in the itinerant antiferromagnet GdSi. Physical Review B, 88 (13). Art. No. 134404. ISSN 1098-0121. doi:10.1103/PhysRevB.88.134404.

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GdSi exhibits spin-density-wave (SDW) order arising from the cooperative interplay of sizeable local moments and a partially nested Fermi sea of itinerant electrons. Using magnetotransport, magnetization, and nonresonant magnetic x-ray diffraction techniques, we determine the H-T phase diagrams of GdSi for magnetic fields up to 21 T, where antiferromagnetic order is no longer stable, and field directions along each of the three major crystal axes. While the incommensurate magnetic ordering vector that characterizes the SDW is robust under magnetic field, the multiple spin structures of this compound are highly flexible and rotate relative to the applied field via either canting or spin-flop processes. The antiferromagnetic spin densities always arrange themselves transverse to the applied magnetic field direction. The phase diagrams are delineated by two types of phase boundaries: one separates a collinear from a planar spin structure associated with a lattice structural transition, and the other defines a spin flop transition that is only weakly temperature dependent. The major features of the phase diagrams along each of the crystal axes can be explained by the combination of local moment and global Fermi surface physics at play.

Item Type:Article
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URLURL TypeDescription
Feng, Yejun0000-0003-3667-056X
Silevitch, D. M.0000-0002-6347-3513
Yan, J.-Q.0000-0001-6625-4706
Additional Information:©2013 American Physical Society. Received 17 July 2013; published 7 October 2013. The work at the University of Chicago was supported by National Science Foundation Grant No. 1206519 and used MRSEC shared facilities, NSF Grant No. DMR-0820054. The work at the Advanced Photon Source of Argonne National Laboratory was supported by the U.S. Department of Energy Basic Energy Sciences under Contract No. NE-AC02-06CH11357. Work performed at the National High Magnetic Field Laboratory was supported by National Science Foundation Cooperative Agreement No. DMR-1157490, the State of Florida, and the U.S. Department of Energy. Work at Oak Ridge National Laboratory was supported by the Materials Sciences and Engineering Division, DOE-BES. A.P. was supported in part by DOE-SCGF under Contract DE-AC05-06OR23100.
Funding AgencyGrant Number
Department of Energy (DOE)NE-AC02-06CH11357
State of FloridaUNSPECIFIED
Department of Energy (DOE)DE-AC05-06OR23100
Issue or Number:13
Classification Code:PACS number(s): 75.30.Fv, 75.30.Kz, 75.25.−j, 72.15.Gd
Record Number:CaltechAUTHORS:20140707-131948529
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46890
Deposited By: George Porter
Deposited On:11 Jul 2014 03:50
Last Modified:10 Nov 2021 17:31

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