Unusual coercivity and zero field stabilization of fully saturated magnetization in single crystals of LaCrGe${}_3$

Abstract

LaCrGe${}_3$ is an itinerant, metallic ferromagnet with a Curie temperature ($T_C$) of $\sim$ 86 K. Whereas LaCrGe${}_3$ has been studied extensively as a function of pressure as an example of avoided ferromagnetic quantum criticality, questions about its ambient pressure ordered state remain; specifically, whether there is a change in the nature of the ferromagnetically ordered state below $T_C$ $\sim$ 86 K. We present anisotropic $M$($H$) isotherms, coupled with anisotropic AC susceptibility data, and demonstrate that LaCrGe${}_3$ has a remarkable, low temperature coercivity associated with exceptionally sharp, complete magnetization reversals to and from fully polarized states. This coercivity is temperature dependent, it drops to zero in the 40 - 55 K region and reappears in the 70 - 85 K regions. At low temperatures LaCrGe${}_3$ has magnetization loops and behavior that has previously associated with micromagnetic/nanocrystalline materials, not bulk, macroscopic samples.

arXiv comment7+2 pages and 7+5 figures

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Cited by in corpus (4)

• Magnetic domain depinning as possible evidence for two ferromagnetic phases in LaCrGe${}_3$
• Enhancement of the Curie temperature in single crystalline ferromagnetic LaCrGe${}_3$ by electron irradiation-induced disorder
• Signatures of two ferromagnetic states and goniopolarity in LaCrGe3 in the Hall effect
• Quantum critical point followed by Kondo-like behavior due to Cu substitution in itinerant, antiferromagnet ${\text{La}}_2{\text{(Cu}}_x{\text{Ni}}_{1-x}{)}_7$