About: Preparation and properties of Mg-Fe nanocomposite.

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Mg-Fe nanocomposite was prepared using spark synthesis of pure Mg and Fe electrodes. The as-prepared powder was separated into two parts using a magnetic separation and a sedimentation procedure. The nanocrystalline powder (paramagnetic at room temperature) was analysed using x-ray diffraction and Mössbauer spectroscopy. From the x-ray diffraction measurements Mg, MgO, and a-Fe were recognized. According to the Mössbauer spectra analysis, iron atoms were identified in following phases: a-Fe, Fe in Mg, and FeO. The FeO was probably present as MgO-FeO solid solution and not recognized by x-ray diffraction. The Fe in Mg phase was represented in the Mössbauer spectra as two doublets with isomer shifts d1=0.16 0.02 and d2=0.43 0.01 mm/s relative to a-Fe and quadrupole splittings s1=0.84 0.02 and s2=0.80 0.01 mm/s. Low temperature magnetic measurements showed spin-glass like behaviour of the powder. Annealing in vacuum (10-3 Pa) or in the protective atmosphere (H2) caused transformation of the Fe in Mg phas Mg-Fe nanocomposite was prepared using spark synthesis of pure Mg and Fe electrodes. The as-prepared powder was separated into two parts using a magnetic separation and a sedimentation procedure. The nanocrystalline powder (paramagnetic at room temperature) was analysed using x-ray diffraction and Mössbauer spectroscopy. From the x-ray diffraction measurements Mg, MgO, and a-Fe were recognized. According to the Mössbauer spectra analysis, iron atoms were identified in following phases: a-Fe, Fe in Mg, and FeO. The FeO was probably present as MgO-FeO solid solution and not recognized by x-ray diffraction. The Fe in Mg phase was represented in the Mössbauer spectra as two doublets with isomer shifts d1=0.16 0.02 and d2=0.43 0.01 mm/s relative to a-Fe and quadrupole splittings s1=0.84 0.02 and s2=0.80 0.01 mm/s. Low temperature magnetic measurements showed spin-glass like behaviour of the powder. Annealing in vacuum (10-3 Pa) or in the protective atmosphere (H2) caused transformation of the Fe in Mg phas (en)
Title	Preparation and properties of Mg-Fe nanocomposite. Preparation and properties of Mg-Fe nanocomposite. (en)
skos:prefLabel	Preparation and properties of Mg-Fe nanocomposite. Preparation and properties of Mg-Fe nanocomposite. (en)
skos:notation	RIV/68081723:_____/01:07013272!RIV/2003/AV0/A07003/N
http://linked.open.../vavai/riv/strany	105
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA106/99/0183), P(GA202/01/0668), P(OC 523.20), Z(AV0Z2041904)
http://linked.open...vai/riv/dodaniDat	2003
http://linked.open...aciTvurceVysledku	Schneeweiss, Oldřich Jirásková, Yvonna
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky materiálů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	692529
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/01:07013272
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	nanocomposites; Mössbauer spectroscopy (en)
http://linked.open.../riv/klicoveSlovo	Mössbauer spectroscopy nanocomposites
http://linked.open...ontrolniKodProRIV	[868957E341C0]
http://linked.open...v/mistoKonaniAkce	Seeheim [DE]
http://linked.open...i/riv/mistoVydani	Darmstadt
http://linked.open...i/riv/nazevZdroje	First Seeheim Conference on Magnetism SCM2001 - Program and Abstracts.
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...vavai/riv/projekt	Metallic materials with pronounced magnetotransport, magnetocaloric and magnetoelastic effects Relation between structure, electric and magnetic parameters of nanocrystalline and gradient materials and their diffusibility and solubility for gases http://linked.opendata.cz/resource/domain/vavai/projekt/OC%20523.20
http://linked.open...UplatneniVysledku	2001
http://linked.open...iv/tvurceVysledku	Schneeweiss, Oldřich Jirásková, Yvonna
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2001-09-09 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Behavior and properties of metallic and non-metallic materials in relation to their structure, research on processes leading to degradation of material quality
number of pages	1 (xsd:int)
http://purl.org/ne...btex#hasPublisher	University of Darmstadt

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