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Statements

Subject Item
n2:RIV%2F68081723%3A_____%2F01%3A07013272%21RIV%2F2003%2FAV0%2FA07003%2FN
rdf:type
n15:Vysledek skos:Concept
dcterms: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
dcterms:title
Preparation and properties of Mg-Fe nanocomposite. Preparation and properties of Mg-Fe nanocomposite.
skos:prefLabel
Preparation and properties of Mg-Fe nanocomposite. Preparation and properties of Mg-Fe nanocomposite.
skos:notation
RIV/68081723:_____/01:07013272!RIV/2003/AV0/A07003/N
n3:strany
105
n3:aktivita
n4:Z n4:P
n3:aktivity
P(GA106/99/0183), P(GA202/01/0668), P(OC 523.20), Z(AV0Z2041904)
n3:dodaniDat
n13:2003
n3:domaciTvurceVysledku
n8:6329446 n8:7873212
n3:druhVysledku
n17:D
n3:duvernostUdaju
n11:S
n3:entitaPredkladatele
n20:predkladatel
n3:idSjednocenehoVysledku
692529
n3:idVysledku
RIV/68081723:_____/01:07013272
n3:jazykVysledku
n16:eng
n3:klicovaSlova
nanocomposites; Mössbauer spectroscopy
n3:klicoveSlovo
n14:nanocomposites n14:M%C3%B6ssbauer%20spectroscopy
n3:kontrolniKodProRIV
[868957E341C0]
n3:mistoKonaniAkce
Seeheim [DE]
n3:mistoVydani
Darmstadt
n3:nazevZdroje
First Seeheim Conference on Magnetism SCM2001 - Program and Abstracts.
n3:obor
n12:BM
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
2
n3:pocetUcastnikuAkce
0
n3:pocetZahranicnichUcastnikuAkce
0
n3:projekt
n9:OC%20523.20 n9:GA106%2F99%2F0183 n9:GA202%2F01%2F0668
n3:rokUplatneniVysledku
n13:2001
n3:tvurceVysledku
Schneeweiss, Oldřich Jirásková, Yvonna
n3:typAkce
n7:WRD
n3:zahajeniAkce
2001-09-09+02:00
n3:zamer
n19:AV0Z2041904
s:numberOfPages
1
n6:hasPublisher
University of Darmstadt