Multicritical end point of the first-order ferromagnetic transition in colossal magnetoresistive manganites

L. Demkó, I. Kézsmárki, G. Mihály, N. Takeshita, Y. Tomioka, Y. Tokura

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

We have studied the bandwidth-temperature-magnetic-field phase diagram of RE0.55Sr0.45MnO3 colossal magnetoresistance manganites with ferromagnetic metal (FM) ground state. The bandwidth was controlled both via chemical substitution and hydrostatic pressure with a focus on the vicinity of the critical pressure p* where the character of the zero-field FM transition changes from first to second order. Below p* the first-order FM transition extends up to a critical magnetic field. It approaches zero on the larger bandwidth side where the surface of the first-order FM phase boundary is terminated by a multicritical end point. The change in the character of the transition and the decrease of the colossal magnetoresistance effect is attributed to the reduced charge-order and orbital-order fluctuations.

Original languageEnglish
Article number037206
JournalPhysical Review Letters
Volume101
Issue number3
DOIs
Publication statusPublished - Jul 18 2008

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bandwidth
transition metals
critical pressure
magnetic fields
hydrostatic pressure
metals
phase diagrams
substitutes
orbitals
ground state
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Multicritical end point of the first-order ferromagnetic transition in colossal magnetoresistive manganites. / Demkó, L.; Kézsmárki, I.; Mihály, G.; Takeshita, N.; Tomioka, Y.; Tokura, Y.

In: Physical Review Letters, Vol. 101, No. 3, 037206, 18.07.2008.

Research output: Contribution to journalArticle

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AU - Tomioka, Y.

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