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Ferromagnetic Quantum Critical Point Avoided by the Appearance of Another Magnetic Phase in LaCrGe3 under Pressure

TitleFerromagnetic Quantum Critical Point Avoided by the Appearance of Another Magnetic Phase in LaCrGe3 under Pressure
Publication TypeJournal Article
Year of Publication2016
AuthorsTaufour, V, Kaluarachchi, US, Khasanov, R, Nguyen, MC, Guguchia, Z, Biswas, PK, Bonfa, P, De Renzi, R, Lin, X, Kim, SK, Mun, ED, Kim, H, Furukawa, Y, Wang, CZ, Ho, KM, Bud'ko, SL, Canfield, PC
JournalPhysical Review Letters
Volume117
Pagination037207
Date Published07
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberWOS:000379578200002
Keywordsbehavior, dependence, energy, gpa, metals, physics, resistivity, superconductivity, susceptibility, systems, transitions
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 = 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.

DOI10.1103/PhysRevLett.117.037207
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Complex States

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Exploratory Theory

Alternate JournalPhys. Rev. Lett.