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Statements

Subject Item
n2:RIV%2F68081723%3A_____%2F01%3A07013271%21RIV%2F2003%2FAV0%2FA07003%2FN
rdf:type
n9:Vysledek skos:Concept
dcterms:description
A composite based on 3d metals particles embedded in MgO matrix is a promising material for application in sensors using high magnetoresistance. We prepared Mg-Fe-Ni nanocomposite using spark synthesis of the pure Mg, and permalloy (Ni3Fe) electrodes. The magnetic separation and sedimentation treatments were used for separation of nanocrystalline parts from the as-prepared powders. In the as-prepared powder, a-Fe + g-Ni3Fe, Fe(Ni) in Mg, and FeO phases were determined using the Mössbauer phase analysis. Some of the phases were confirmed by the x-ray diffraction measurements. The TG/DTA results indicate presence nanoparticles of Fe-Ni hydrides and high adsorption capacity of moisture and air gases. Temperature dependence of magnetization shows spin-glass like behaviour of the sample. Transformation of the Fe(Ni) in Mg phase and the hydride phases into a-Fe + g Ni3Fe and simultaneously an increasing in FeO + MgO were observed after annealing in vacuum (10-3 Pa) or in the protective atmosphere (H2). A composite based on 3d metals particles embedded in MgO matrix is a promising material for application in sensors using high magnetoresistance. We prepared Mg-Fe-Ni nanocomposite using spark synthesis of the pure Mg, and permalloy (Ni3Fe) electrodes. The magnetic separation and sedimentation treatments were used for separation of nanocrystalline parts from the as-prepared powders. In the as-prepared powder, a-Fe + g-Ni3Fe, Fe(Ni) in Mg, and FeO phases were determined using the Mössbauer phase analysis. Some of the phases were confirmed by the x-ray diffraction measurements. The TG/DTA results indicate presence nanoparticles of Fe-Ni hydrides and high adsorption capacity of moisture and air gases. Temperature dependence of magnetization shows spin-glass like behaviour of the sample. Transformation of the Fe(Ni) in Mg phase and the hydride phases into a-Fe + g Ni3Fe and simultaneously an increasing in FeO + MgO were observed after annealing in vacuum (10-3 Pa) or in the protective atmosphere (H2).
dcterms:title
Structure and Properties of Mg-Ni-Fe Based Nanaocomposite Prepared by Spark Synthesis. Structure and Properties of Mg-Ni-Fe Based Nanaocomposite Prepared by Spark Synthesis.
skos:prefLabel
Structure and Properties of Mg-Ni-Fe Based Nanaocomposite Prepared by Spark Synthesis. Structure and Properties of Mg-Ni-Fe Based Nanaocomposite Prepared by Spark Synthesis.
skos:notation
RIV/68081723:_____/01:07013271!RIV/2003/AV0/A07003/N
n3:strany
48
n3:aktivita
n6:P n6:Z
n3:aktivity
P(GA202/01/0668), P(GV202/98/K002), P(KSK1010104), P(ME 209), Z(AV0Z2041904), Z(AV0Z4032918)
n3:dodaniDat
n19:2003
n3:domaciTvurceVysledku
n13:7435312 n13:6329446 n13:7873212
n3:druhVysledku
n20:D
n3:duvernostUdaju
n11:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
697477
n3:idVysledku
RIV/68081723:_____/01:07013271
n3:jazykVysledku
n16:eng
n3:klicovaSlova
nanomaterials; magnetic properties; Mössbauer spectroscopy
n3:klicoveSlovo
n7:nanomaterials n7:M%C3%B6ssbauer%20spectroscopy n7:magnetic%20properties
n3:kontrolniKodProRIV
[FBCFD16516B0]
n3:mistoKonaniAkce
Maatsricht [NL]
n3:mistoVydani
Nijmegen
n3:nazevZdroje
SMARTON 5 Workshop: Functional Surfaces and Materials. Exploring the Vectorial World.
n3:obor
n14:BM
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
5
n3:pocetUcastnikuAkce
0
n3:pocetZahranicnichUcastnikuAkce
0
n3:projekt
n4:KSK1010104 n4:GV202%2F98%2FK002 n4:ME%20209 n4:GA202%2F01%2F0668
n3:rokUplatneniVysledku
n19:2001
n3:tvurceVysledku
Bezdička, Petr Schneeweiss, Oldřich Večerníková, Eva Žák, Tomáš Jirásková, Yvonna
n3:typAkce
n12:WRD
n3:zahajeniAkce
2001-11-15+01:00
n3:zamer
n5:AV0Z2041904 n5:AV0Z4032918
s:numberOfPages
1
n18:hasPublisher
Katholieke Universiteit Nijmegen