Ferromagnetic Quantum Critical Point Avoided by the Appearance of Another Magnetic Phase in LaCrGe${}_3$ under Pressure

Abstract

The temperature-pressure phase diagram of the ferromagnet LaCrGe${}_3$ 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, AFM${}_Q$. 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 LaCrGe${}_3$ 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.

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• Pressure tuning of structural and magnetic transitions in EuAg${}_4$As${}_2$
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• Exceedingly Small Moment Itinerant Ferromagnetism of Single Crystalline La${}_5$Co${}_2$Ge${}_3$
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• Weak itinerant magnetic phases of La2Ni7
• Small moment antiferromagnetic ordering in single crystalline La2Ni7
• Unusual coercivity and zero field stabilization of fully saturated magnetization in single crystals of LaCrGe${}_3$
• Magnetic domain depinning as possible evidence for two ferromagnetic phases in LaCrGe${}_3$
• Electron Spin Resonance of the itinerant ferromagnets LaCrGe3, CeCrGe3 and PrCrGe3
• Collapse of Kondo state and ferromagnetic quantum phase transition in YbFe${}_2$Zn${}_{20}$
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• Magnetic and structural properties of the intermetallic Ce(1-x)LaxCrGe3 series of compounds
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• Topological Descendants of Multicritical EuTl2
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• 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
• Spatially modulated, orbital selective ferromagnetism in La${}_5$Co${}_2$Ge${}_3$
• Avoided ferromagnetic quantum critical point in CeZn
• Non-collinear ferromagnetism in the Kondo lattice Ce${}_5$CoGe${}_2$