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Field induced first order antiferromagnetic to ferromagnetic transition in Al-doped CeFe$_2$: a calorimetric investigation | | L.S. Sharath Chandra
; Kaustav Mukherjee
; V. Ganesan
; A. Banerjee
; P. Chaddah
; M.K. Chattopadhyay
; S.B. Roy
; | | Date: |
30 Aug 2005 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | Field variation of heat capacity at fixed temperatures is investigated to identify the origin of the field induced first order phase transition in polycrystalline Ce(Fe$_{0.094}$Al$_{0.04}$)$_2$ sample. The heat capacity at 4.5K and 3.5K shows hysteresis in different field cycles and the virgin curve stays outside the envelope curve. This is analogous to the magnetization and magneto-resistance behavior observed in this system, where the amount of hysteresis, and the magnitude of zero-field irreversibility are attributed to the degree of supercooling/superheating, and the extent of kinetic arrest of the reverse transition from ferro- to antifrromagnetic state in field reducing cycle respectively. However, contrary to the magnetization and magneto-resistance, in heat capacity both these features have decreased with reducing temperature signifying the importance of structural contribution. | | Source: | arXiv, cond-mat/0508733 | | Services: | Forum | Review | PDF | Favorites | |
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