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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F14%3A10271614%21RIV15-MSM-11320___
rdf:type
n12:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1103/PhysRevB.89.054407
dcterms:description
Crystal structure, magnetic, and transport properties of the U2Fe3Ge compound have been studied under hydrostatic pressure. U2Fe3Ge crystallizes in the hexagonal crystal structure of the Mg2Cu3Si type, an ordered variant of the MgZn2 Laves structure (C14). The Laves phase has proven highly stable; the crystal structure is maintained up to 27 GPa, the highest applied pressure. X-ray diffraction data revealed that the c direction, where the shortest U-U bonds lie, is softer than the a direction. The bulk modulus B-0 is similar to 100 GPa. U2Fe3Ge is an itinerant ferromagnet with the Curie temperature T-C = 55 K and the spontaneous magnetic moment M-s = 1 mu(B) per formula unit at ambient pressure. The two parameters decrease rapidly under pressure with the rates d(ln M-s)/dp = -0.33 GPa(-1) and d(ln T-C)/dp = -0.27 GPa(-1). The extrapolation of T-C and M-s indicates that the magnetic order will be suppressed between 3 and 4 GPa. Electrical resistivity was found to decrease gradually with increasing pressure. The data in the ferromagnetic state points to the opening of a gap in the magnon spectrum at higher pressures. U2Fe3Ge is relatively more sensitive to pressure than isostructural UNi2. Crystal structure, magnetic, and transport properties of the U2Fe3Ge compound have been studied under hydrostatic pressure. U2Fe3Ge crystallizes in the hexagonal crystal structure of the Mg2Cu3Si type, an ordered variant of the MgZn2 Laves structure (C14). The Laves phase has proven highly stable; the crystal structure is maintained up to 27 GPa, the highest applied pressure. X-ray diffraction data revealed that the c direction, where the shortest U-U bonds lie, is softer than the a direction. The bulk modulus B-0 is similar to 100 GPa. U2Fe3Ge is an itinerant ferromagnet with the Curie temperature T-C = 55 K and the spontaneous magnetic moment M-s = 1 mu(B) per formula unit at ambient pressure. The two parameters decrease rapidly under pressure with the rates d(ln M-s)/dp = -0.33 GPa(-1) and d(ln T-C)/dp = -0.27 GPa(-1). The extrapolation of T-C and M-s indicates that the magnetic order will be suppressed between 3 and 4 GPa. Electrical resistivity was found to decrease gradually with increasing pressure. The data in the ferromagnetic state points to the opening of a gap in the magnon spectrum at higher pressures. U2Fe3Ge is relatively more sensitive to pressure than isostructural UNi2.
dcterms:title
Effects of high pressure on the structural, magnetic, and transport properties of the itinerant 5 f ferromagnet U2Fe3Ge Effects of high pressure on the structural, magnetic, and transport properties of the itinerant 5 f ferromagnet U2Fe3Ge
skos:prefLabel
Effects of high pressure on the structural, magnetic, and transport properties of the itinerant 5 f ferromagnet U2Fe3Ge Effects of high pressure on the structural, magnetic, and transport properties of the itinerant 5 f ferromagnet U2Fe3Ge
skos:notation
RIV/00216208:11320/14:10271614!RIV15-MSM-11320___
n3:aktivita
n4:S n4:P n4:I
n3:aktivity
I, P(GAP204/10/0330), P(GAP204/12/0150), P(LM2011025), S
n3:cisloPeriodika
5
n3:dodaniDat
n14:2015
n3:domaciTvurceVysledku
Gorbunov, Denis n17:3399087 n17:9896236
n3:druhVysledku
n7:J
n3:duvernostUdaju
n18:S
n3:entitaPredkladatele
n20:predkladatel
n3:idSjednocenehoVysledku
13731
n3:idVysledku
RIV/00216208:11320/14:10271614
n3:jazykVysledku
n9:eng
n3:klicovaSlova
gpa; resistivity; superconductivity; ufe2; uranium-compounds; heavy-fermion compounds
n3:klicoveSlovo
n10:uranium-compounds n10:gpa n10:superconductivity n10:resistivity n10:heavy-fermion%20compounds n10:ufe2
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[4E7AF1A74432]
n3:nazevZdroje
Physical Review B - Condensed Matter and Materials Physics
n3:obor
n6:BM
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
11
n3:projekt
n5:GAP204%2F12%2F0150 n5:GAP204%2F10%2F0330 n5:LM2011025
n3:rokUplatneniVysledku
n14:2014
n3:svazekPeriodika
89
n3:tvurceVysledku
Prchal, Jiří Henriques, M. S. Heathman, S. Gorbunov, Denis Goncalves, A. P. Andreev, A. V. Surble, S. Arnold, Z. Havela, Ladislav Griveau, J.-C. Lopes, E. B.
n3:wos
000332379900003
s:issn
1098-0121
s:numberOfPages
9
n19:doi
10.1103/PhysRevB.89.054407
n8:organizacniJednotka
11320