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Collapse of a region of the magnetic phase diagram of elemental terbium under a strain-induced Lifshitz transition

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Andrianov, A. Vl., Mendive-Tapia, E., Beskrovnyi, A. I. and Staunton, Julie B. (2021) Collapse of a region of the magnetic phase diagram of elemental terbium under a strain-induced Lifshitz transition. Physical Review B (Condensed Matter and Materials Physics), 104 (17). 174435. doi:10.1103/PhysRevB.104.174435

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Official URL: http://dx.doi.org/10.1103/PhysRevB.104.174435

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Abstract

AC susceptibility and neutron scattering measurements are used to study the magnetic field-temperature magnetic phase diagram of a Tb single crystal under uniaxial tension along its hexagonal c axis. An external magnetic field is applied in the basal plane. We focus on the region in the phase diagram that corresponds to the helical antiferromagnetic phase and find that this region collapses when the uniaxial tension is increased beyond a critical value as low as 600 bar. There are strong reasons to associate this collapse with an underlying Lifshitz transition in the Fermi surface of Tb's valence electrons. We use a finite-temperature ab initio theory to analyze our measurements, obtaining a pressure-temperature magnetic phase diagram in very good agreement with experiment. Our calculations indicate that short- and long-range magnetic order has a crucial effect on the Fermi surface nesting and consequent magnetism of Tb.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Neutrons -- Scattering, Magnetic resonance, Fermi surfaces, Terbium , Antiferromagnetism , Rare earth metals -- Magnetic properties
Journal or Publication Title: Physical Review B (Condensed Matter and Materials Physics)
Publisher: American Physical Society
ISSN: 1098-0121
Official Date: 24 November 2021
Dates:
DateEvent
24 November 2021Published
11 November 2021Accepted
Volume: 104
Number: 17
Article Number: 174435
DOI: 10.1103/PhysRevB.104.174435
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/M028941/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266

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