First order transition from ferromagnetism to antiferromagnetism in Ce(Fe${}_{0.96}$Al${}_{0.04}$)${}_2$: a magnetotransport study

Abstract

The magnetotransport behaviour is investigated in detail across the first order magnetic phase transition from ferromagnetic to antiferromagnetic state in polycrystalline Ce(Fe${}_{0.96}$Al${}_{0.04}$)${}_2$ sample. The study clearly brings out various generic features associated with a first order transition, viz., hysteresis, phase coexistence, supercooling and superheating, presence and limits of the metastable regimes. These results of magnetotransport study exhibit and support all the interesting thermomagnetic history effects that were observed in our earlier dc-magnetisation study on the same sample. Most notable here is the initial (or virgin) resistivity vs. field curve lying outside the hysteretic "butterfly shaped" magnetoresistivity loops obtained on cyclying the magnetic field between high enough positive and negative strengths. These findings, bearing one-to-one similarity with the data obtained in their magnetic counterpart (i.e., dc-magnetisation), have been ascribed an origin due to the arresting of this first order transition kinetics at low temperature and high magnetic field.

21 pages, 5 figures. Accepted for publication in Physical Review B

References in corpus (1)

• First order transition from antiferromagnetism to ferromagnetism in Ce(Fe${}_{0.96}$Al${}_{0.04}{)}_2$

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