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, 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 1⁄4 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.

Ferromagnetic Quantum Critical Point Avoided by the Appearance of Another Magnetic Phase inLaCrGe3under Pressure / Taufour, Valentin; Kaluarachchi, Udhara S.; Khasanov, Rustem; Nguyen, Manh Cuong; Guguchia, Zurab; Biswas, Pabitra Kumar; Bonfa', Pietro; DE RENZI, Roberto; Lin, Xiao; Kim, Stella K.; Mun, Eun Deok; Kim, Hyunsoo; Furukawa, Yuji; Wang, Cai Zhuang; Ho, Kai Ming; Bud’Ko, Sergey L.; Canfield, Paul C.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 117:3(2016), pp. 037207-1-037207-6. [10.1103/PhysRevLett.117.037207]

Ferromagnetic Quantum Critical Point Avoided by the Appearance of Another Magnetic Phase inLaCrGe3under Pressure

BONFA', Pietro;DE RENZI, Roberto;
2016-01-01

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, 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 1⁄4 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.
2016
Ferromagnetic Quantum Critical Point Avoided by the Appearance of Another Magnetic Phase inLaCrGe3under Pressure / Taufour, Valentin; Kaluarachchi, Udhara S.; Khasanov, Rustem; Nguyen, Manh Cuong; Guguchia, Zurab; Biswas, Pabitra Kumar; Bonfa', Pietro; DE RENZI, Roberto; Lin, Xiao; Kim, Stella K.; Mun, Eun Deok; Kim, Hyunsoo; Furukawa, Yuji; Wang, Cai Zhuang; Ho, Kai Ming; Bud’Ko, Sergey L.; Canfield, Paul C.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 117:3(2016), pp. 037207-1-037207-6. [10.1103/PhysRevLett.117.037207]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2809575
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