About: Influence of symmetry on Sm magnetism studied on SmIr2Si2 polymorphs

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About: Influence of symmetry on Sm magnetism studied on SmIr2Si2 polymorphs Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1016/j.jallcom.2013.05.047
Description	Polycrystalline samples of SmIr2Si2 formed at room temperature both the low temperature phase (LTP) and the metastable high temperature phase (HTP), respectively, depending on the heat treatment. The samples were studied by X-ray powder diffraction, DTA, specific-heat and magnetization measurements with respect to temperature and magnetic field. The first order LTP <-> HTP polymorphic phase transition has been determined showing the huge temperature hysteresis of 264 degrees C caused by the high energy barrier due to the change of stacking of the Sm, Ir and Si basal plane sheets within the transition. Both polymorphs show indications of antiferromagnetic order at low temperatures. The considerably different magnetic phase transitions determined for the LTP and HTP confirm the strong influence of crystal structure symmetry on magnetism in the two polymorphs. The magnetism in SmIr2Si2 exhibits typical features caused by the specific behavior of Sm3+ ion characterized by energy nearness of the ground state and first excited state and crystal field influence. The interpretation of experimental results is corroborated by results of ab initio electronic structure calculations. Polycrystalline samples of SmIr2Si2 formed at room temperature both the low temperature phase (LTP) and the metastable high temperature phase (HTP), respectively, depending on the heat treatment. The samples were studied by X-ray powder diffraction, DTA, specific-heat and magnetization measurements with respect to temperature and magnetic field. The first order LTP <-> HTP polymorphic phase transition has been determined showing the huge temperature hysteresis of 264 degrees C caused by the high energy barrier due to the change of stacking of the Sm, Ir and Si basal plane sheets within the transition. Both polymorphs show indications of antiferromagnetic order at low temperatures. The considerably different magnetic phase transitions determined for the LTP and HTP confirm the strong influence of crystal structure symmetry on magnetism in the two polymorphs. The magnetism in SmIr2Si2 exhibits typical features caused by the specific behavior of Sm3+ ion characterized by energy nearness of the ground state and first excited state and crystal field influence. The interpretation of experimental results is corroborated by results of ab initio electronic structure calculations. (en)
Title	Influence of symmetry on Sm magnetism studied on SmIr2Si2 polymorphs Influence of symmetry on Sm magnetism studied on SmIr2Si2 polymorphs (en)
skos:prefLabel	Influence of symmetry on Sm magnetism studied on SmIr2Si2 polymorphs Influence of symmetry on Sm magnetism studied on SmIr2Si2 polymorphs (en)
skos:notation	RIV/00216208:11320/13:10139972!RIV14-GA0-11320___
http://linked.open...avai/predkladatel	Matematicko-fyzikální fakulta
http://linked.open...avai/riv/aktivita	I P S
http://linked.open...avai/riv/aktivity	I, P(GAP204/12/0692), P(LM2011025), S
http://linked.open...iv/cisloPeriodika	May
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Vališka, Michal Pospíšil, Jiří Diviš, Martin Rudajevová, Alexandra Sechovský, Vladimír Prokleška, Jan Turek, Ilja
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	79951
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/13:10139972
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	DFT; Crystal field; Hysteresis; DTA; Polymorphism; SmIr2Si2 (en)
http://linked.open.../riv/klicoveSlovo	DTA Crystal field SmIr2Si2 DFT Hysteresis Polymorphism
http://linked.open...odStatuVydavatele	CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV	[93A6E2A7B1F9]
http://linked.open...i/riv/nazevZdroje	Journal of Alloys and Compounds
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	7 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Magnetic poly-functional materials – new access of theory and experiment MLTL - Magnetism and Low Temperature Laboratories - operation and development of national research infrastructure
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	574
http://linked.open...iv/tvurceVysledku	Pospíšil, Jiří Rudajevová, Alexandra Turek, Ilja Diviš, Martin Prokleška, Jan Sechovský, Vladimír Vališka, Michal
http://linked.open...ain/vavai/riv/wos	000321749600075
issn	0925-8388
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.jallcom.2013.05.047
http://localhost/t...ganizacniJednotka	11320

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