Two-phase coexistence is tunable and is not the equilibrium state in half-doped manganites

Details Two-phase coexistence is tunable and is not the equilibrium state in half-doped manganites Two-phase coexistence is tunable and is not the equilibrium state in half-doped manganites

2007-03-06

arxiv.org/abs/cond-mat/0703140v1

Physics

Condensed Matter

Strongly Correlated Electrons

Manuscript of invited talk at MESODIS Conference at IIT, Kanpur, December 2006

Scientific paper

We discuss our very interesting experimental observation that the low-temperature two-phase coexistence in half-doped manganites is multi-valued (at any field) in that we can tune the coexisting antiferromagnetic-insulating(AF-I) and the ferromagnetic-metallic(FM-M) phase-fractions by following different paths in (H,T) space. We have shown experimentally that the phase-fraction, in this two-phase coexistence, can take continuous infinity of values. All but one of these are metastable, and two-phase coexistence is not an equilibrium state.

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