Enhanced magnetocaloric effect in distilled terbium and emergence of novel properties after severe plastic deformation
Abstract
We report the magneto-structural and magnetocaloric properties study of Tb purified by distillation and further processed by severe plastic deformation (SPD). Both parent and the SPD-processed Tb contain nanosized structural elements and have a very pronounced (00l) texture.
We observe an improved magnetocaloric effect (MCE) in the distilled nanocrystalline Tb while novel properties emerge in the sample after severe plastic deformation. The latter demonstrates zero thermal expansion over a wide temperature range while its MCE vanishes.
We show that the absolutely new physical properties in Tb result from the structural transformation and modification of magnetic interactions. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd.
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