Magnetic-field-induced transition in BaVS3

P. Fazekas, N. Barišić, I. Kézsmárki, L. Demkó, H. Berger, L. Forró, G. Mihály

Research output: Contribution to journalArticle

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Abstract

The metal-insulator transition (MIT) of BaVS3 is suppressed under pressure, and above the critical pressure of pcr 2 GPa the metallic phase is stabilized. We present the results of detailed magnetoresistivity measurements carried out at pressures near the critical value in magnetic fields up to B=12 T. We found that slightly below the critical pressure the structural tetramerization-which drives the MIT-is combined with the onset of magnetic correlations. If the zero-field transition temperature is suppressed to a sufficiently low value (TMI ≤15 K), the system can be driven into the metallic state by application of magnetic field. The main effect is not the reduction of TMI with increasing B, but rather the broadening of the transition due to the applied magnetic field. We tentatively ascribe this phenomenon to the influence on the magnetic structure coupled to the bond order of the tetramers.

Original languageEnglish
Article number035128
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number3
DOIs
Publication statusPublished - Jan 29 2007

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critical pressure
Magnetic fields
Metal insulator transition
magnetic fields
insulators
magnetoresistivity
metals
Magnetic structure
Magnetoresistance
transition temperature
Superconducting transition temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Magnetic-field-induced transition in BaVS3. / Fazekas, P.; Barišić, N.; Kézsmárki, I.; Demkó, L.; Berger, H.; Forró, L.; Mihály, G.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 75, No. 3, 035128, 29.01.2007.

Research output: Contribution to journalArticle

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AU - Forró, L.

AU - Mihály, G.

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