arXiv Open Access 2012

History dependence of directly observed magnetocaloric effects in (Mn, Fe)As

Milan Bratko Kelly Morrison Ariana de Campos Sergio Gama Lesley F. Cohen +1 lainnya

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Abstrak

We use a calorimetric technique operating in sweeping magnetic field to study the thermomagnetic history- dependence of the magnetocaloric effect (MCE) in Mn0.985Fe0.015As. We study the magnetization history for which a "colossal" MCE has been reported when inferred indirectly via a Maxwell relation. We observe no colossal effect in the direct calorimetric measurement. We further examine the impact of mixed-phase state on the MCE and show that the first order contribution scales linearly with the phase fraction. This validates various phase-fraction based methods developed to remove the colossal peak anomaly from Maxwell-based estimates.

Topik & Kata Kunci

cond-mat.str-el cond-mat.mtrl-sci

Penulis (6)

Milan Bratko

Kelly Morrison

Ariana de Campos

Sergio Gama

Lesley F. Cohen

Karl G. Sandeman

Format Sitasi

APA MLA BibTeX

Bratko, M., Morrison, K., Campos, A.d., Gama, S., Cohen, L.F., Sandeman, K.G. (2012). History dependence of directly observed magnetocaloric effects in (Mn, Fe)As. https://arxiv.org/abs/1206.2540

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Informasi Jurnal

Tahun Terbit: 2012
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓