About: Magnetocaloric properties of distilled gadolinium: Effects of structural inhomogeneity and hydrogen impurity

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1063/1.4883744
Description	High-purity Gd prepared by distillation is a structurally inhomogeneous system consisting of needle-shaped crystals of cross section 0.5-2.5 mu m with near-c-axis orientation embedded in a matrix of nanosized (30-100 nm) grains. By measuring the magnetocaloric effect (MCE) directly, we find that the MCE values differ markedly for the plate-shaped samples cut out of a distillate along and perpendicular to the crystals. The effect of small controlled amounts of impurity (hydrogen) on the properties of distilled Gd is further studied. We observe opposite trends in the MCE response to hydrogen charging with respect to the crystal's orientation within the samples and discuss mechanisms interrelating the unique structural morphology with the impurity behavior. As an overall assessment, the Curie temperatures of alpha-GdHx solid solutions increase from 291K up to 294K when increasing hydrogen concentration x from 0 to 0.15. Hydrogenation is found to broaden the ferromagnetic-to-paramagnetic phase transition. Hydrogen-containing specimens demonstrate reversibility of MCE at these temperatures. (C) 2014 AIP Publishing LLC. High-purity Gd prepared by distillation is a structurally inhomogeneous system consisting of needle-shaped crystals of cross section 0.5-2.5 mu m with near-c-axis orientation embedded in a matrix of nanosized (30-100 nm) grains. By measuring the magnetocaloric effect (MCE) directly, we find that the MCE values differ markedly for the plate-shaped samples cut out of a distillate along and perpendicular to the crystals. The effect of small controlled amounts of impurity (hydrogen) on the properties of distilled Gd is further studied. We observe opposite trends in the MCE response to hydrogen charging with respect to the crystal's orientation within the samples and discuss mechanisms interrelating the unique structural morphology with the impurity behavior. As an overall assessment, the Curie temperatures of alpha-GdHx solid solutions increase from 291K up to 294K when increasing hydrogen concentration x from 0 to 0.15. Hydrogenation is found to broaden the ferromagnetic-to-paramagnetic phase transition. Hydrogen-containing specimens demonstrate reversibility of MCE at these temperatures. (C) 2014 AIP Publishing LLC. (en)
Title	Magnetocaloric properties of distilled gadolinium: Effects of structural inhomogeneity and hydrogen impurity Magnetocaloric properties of distilled gadolinium: Effects of structural inhomogeneity and hydrogen impurity (en)
skos:prefLabel	Magnetocaloric properties of distilled gadolinium: Effects of structural inhomogeneity and hydrogen impurity Magnetocaloric properties of distilled gadolinium: Effects of structural inhomogeneity and hydrogen impurity (en)
skos:notation	RIV/00216208:11320/14:10271613!RIV15-MSM-11320___
http://linked.open...avai/riv/aktivita	I P S
http://linked.open...avai/riv/aktivity	I, P(GAP204/12/0150), P(LM2011025), S
http://linked.open...iv/cisloPeriodika	24
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Havela, Ladislav Paukov, Mykhaylo
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	26932
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/14:10271613
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	magnetization; size; anisotropy; transition; performance; alpha-ludx; nanocrystalline gd; electrical-resistivity; room-temperature; rare-earth-metals (en)
http://linked.open.../riv/klicoveSlovo	alpha-ludx electrical-resistivity nanocrystalline gd rare-earth-metals magnetization anisotropy performance room-temperature size transition
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[84EE92E8DB6A]
http://linked.open...i/riv/nazevZdroje	Applied Physics Letters
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	11 (xsd:int)
http://linked.open...vavai/riv/projekt	Magnetism, magnetoelasticity and magnetoacoustics of rare-earth and uranium intermetallics MLTL - Magnetism and Low Temperature Laboratories - operation and development of national research infrastructure
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	104
http://linked.open...iv/tvurceVysledku	Havela, Ladislav Drulis, H. Tereshina, I. S. Burkhanov, G. S. Chistyakov, O. D. Politova, G. A. Kolchugina, N. B. Tereshina, E. A. Paukov, Mykhaylo Badurski, D. Chzhan, V. B.
http://linked.open...ain/vavai/riv/wos	000337915000046
issn	0003-6951
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1063/1.4883744
http://localhost/t...ganizacniJednotka	11320

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