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Ferromagnetic quantum criticality: New aspects from the phase diagram of LaCrGe3

TitleFerromagnetic quantum criticality: New aspects from the phase diagram of LaCrGe3
Publication TypeJournal Article
Year of Publication2018
AuthorsTaufour, V, Kaluarachchi, US, Bud'ko, SL, Canfield, PC
JournalPhysica B-Condensed Matter
Date Published05
Type of ArticleArticle; Proceedings Paper
ISBN Number0921-4526
Accession NumberWOS:000431075600111
KeywordsFerromagnet, Lifshitz point, mnsi, physics, quantum criticality, superconductivity, transitions, Tricritical point, Wing structure

Recent theoretical and experimental studies have shown that ferromagnetic quantum criticality is always avoided in clean systems. Two possibilities have been identified. In the first scenario, the ferromagnetic transition becomes of the first order at a tricritical point before being suppressed. A wing structure phase diagram is observed indicating the possibility of a new type of quantum critical point under magnetic field. In a second scenario, a transition to a modulated magnetic phase occurs. Our recent studies on the compound LaCrGe3 illustrate a third scenario where not only a new magnetic phase occurs, but also a change of order of the transition at a tricritical point leading to a wing-structure phase diagram. Careful experimental study of the phase diagram near the tricritical point also illustrates new rules near this type of point.

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