Volume 80, Number 1, October 2007
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||07 September 2007|
Imaging of time evolution of the first-order magneto-structural transition in Fe-Rh alloy using magnetic force microscopy
Magnetic and Superconducting Materials Section, Raja Ramanna Centre for Advanced Technology - Indore 452 013, M.P., India
2 Laser Systems Engineering Division, Raja Ramanna Centre for Advanced Technology - Indore 452 013, M. P., India
Accepted: 10 August 2007
Cooperative lattice distortion can lead to phase coexistence at micrometer scales across a first-order magneto-structural transition. Using magnetic force microscopy we show such a phase coexistence across an antiferromagnetic to ferromagnetic transition coupled with a structural distortion in the intermetallic alloy of Fe-Rh. Our results provide direct evidence of strong coupling between the elastic and electronic degrees of freedom seen across this first-order magneto-structural transition. Theoretical frameworks based on long-range strain disorder coupling proposed originally for explaining phase coexistence in manganese oxide compounds with colossal magnetoresistance also appear to be applicable for other systems, like intermetallics, undergoing magneto-structural transitions.
PACS: 75.30.Kz – Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
© Europhysics Letters Association, 2007
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