Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

7-15-2016

Journal or Book Title

Physical Review Letters

Volume

117

Issue

3

First Page

037207

DOI

10.1103/PhysRevLett.117.037207

Abstract

The temperature-pressure phase diagram of the ferromagnet LaCrGe3 is determined for the first time from a combination of magnetization, muon-spin-rotation, and electrical resistivity measurements. The ferromagnetic phase is suppressed near 2.1 GPa, but quantum criticality is avoided by the appearance of a magnetic phase, likely modulated, AFMQ. Our density functional theory total energy calculations suggest a near degeneracy of antiferromagnetic states with small magnetic wave vectors Q allowing for the potential of an ordering wave vector evolving from Q=0 to finite Q, as expected from the most recent theories on ferromagnetic quantum criticality. Our findings show that LaCrGe3 is a very simple example to study this scenario of avoided ferromagnetic quantum criticality and will inspire further study on this material and other itinerant ferromagnets.

Comments

This article is from Phys. Rev. Lett. 117, 037207, doi:10.1103/PhysRevLett.117.037207. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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