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.

References in corpus (8)

• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• Pressure induced superconductivity on the border of magnetic order in MnP
• Tricritical point and wing structure in the itinerant ferromagnet UGe2
• The quantum critical point in CeRhIn_5: a resistivity study
• Theory of smeared quantum phase transitions
• Avoided ferromagnetic quantum critical point in CeRuPO
• Magnetic hard-axis ordering near ferromagnetic quantum criticality
• Third law of thermodynamics and the shape of the phase diagram for systems with a first-order quantum phase transition

Cited by in corpus (15)

• Pressure-induced ferromagnetism in the topological semimetal EuCd${}_2$As${}_2$
• Formation of short-range magnetic order and avoided ferromagnetic quantum criticality in pressurized LaCrGe${}_3$
• Quantum tricritical point in the temperature-pressure-magnetic field phase diagram of CeTiGe${}_3$
• Microscopic mechanism for the unusual antiferromagnetic order and the pressure-induced transition to ferromagnetism in USb${}_2$
• Weak itinerant magnetic phases of 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
• Pressure-induced suppression of ferromagnetism in the itinerant ferromagnet LaCrSb${}_3$
• Muon spin rotation and relaxation study on Nb${}_{1-y}$Fe${}_{2+y}$
• Enhancement of the Curie temperature in single crystalline ferromagnetic LaCrGe${}_3$ by electron irradiation-induced disorder
• Inverse melting and intertwined orders in PrCuSb${}_2$
• Signatures of two ferromagnetic states and goniopolarity in LaCrGe3 in the Hall effect
• Avoided ferromagnetic quantum critical point in CeZn
• Non-collinear ferromagnetism in the Kondo lattice Ce${}_5$CoGe${}_2$