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Coexisting ferromagnetic and antiferromagnetic phases over a range oftemperature as well as magnetic field have been reported in many materials ofcurrent interest, showing disorder-broadened 1st order transitions. Anomaloushistory effects observed in magnetization and resistivity are being explainedinvoking the concepts of kinetic arrest akin to glass transitions. Frommagnetization measurements traversing novel paths in field-temperature space,we obtain the intriguing result that the regions of the sample which can besupercooled to lower temperatures undergo kinetic-arrest at highertemperatures, and vice versa. Our results are for two diverse systems viz. theinter-metallic doped CeFe$_2$ which has an antiferromagnetic ground state, andthe oxide La-Pr-Ca-Mn-O which has a ferromagnetic ground state, indicating thepossible universality of this effect of disorder on the widely encounteredphenomenon of glass-like arrest of kinetics

physical review. b, condensed matter and materials physics

Relating supercooling and glass-like arrest of kinetics for phase separated systems: Doped<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Ce</mml:mi><mml:msub><mml:mi mathvariant="normal">Fe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mi mathvariant="normal">La</mml:mi><mml:mo>,</mml:mo><mml:mi …

Relating supercooling and glass-like arrest of kinetics for phase separated systems: DopedCeFe2and(La,