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Crystal and magnetic structure investigation of TbNi5-xCux (x=0,0.5,1.0,1.5,2.0) : Experiment and theory

Lizárraga, Raquel (author)
Uppsala universitet,Fysiska institutionen
Bergman, Anders (author)
Uppsala universitet,Fysiska institutionen
Björkman, Torbjörn (author)
Uppsala universitet,Fysiska institutionen
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Liu, H-P (author)
Uppsala universitet,Institutionen för materialkemi
Andersson, Yvonne (author)
Uppsala universitet,Oorganisk kemi,Strukturkemi
Gustafsson, Torbjörn (author)
Uppsala universitet,Oorganisk kemi,Strukturkemi
Kuchin, A. G. (author)
Ermolenko, A. S. (author)
Nordström, Lars (author)
Uppsala universitet,Fysiska institutionen
Eriksson, Olle (author)
Uppsala universitet,Fysiska institutionen
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 (creator_code:org_t)
2006
2006
English.
In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 74:9, s. 094419-
Related links:
https://urn.kb.se/re...
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The effect of Cu substitution on the structural and magnetic properties of TbNi5-xCux (x=0,0.5,1.0,1.5,2.0) have been investigated by x-ray diffraction, magnetization measurements and neutron powder and single crystal diffraction. The electronic and the magnetic structures of TbNi5 were studied using first principles theory. All samples were found to have the CaCu5-type structure, space group P6/mmm. The lattice parameters increase monotonically with increasing Cu concentration. The Curie temperature T-c has a maximum value of 29 K at x=1.0. The magnetic structure of TbNi5 at 10 K is incommensurate with a helimagnetic component [wave vector q similar to 2 pi/c(0,0,0.02)] perpendicular to a ferromagnetic one. In contrast, the substituted TbNi5-xCux alloy is ferromagnetic. All magnetic moments are observed to be located on the Tb atoms. The magnetocrystalline anisotropy in the ab plane is observed to be strongly increased by the Cu substitution, whereas the magnetization decreases with the Cu concentration. The observed magnetic structure of TbNi5 is consistent with first principles calculations regarding both the magnetic moments and the helimagnetic structure. The microscopical origin of the helimagnet is analyzed and correlated to the Fermi surface topology.

Subject headings

NATURVETENSKAP  -- Kemi -- Oorganisk kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Keyword

Inorganic chemistry
Oorganisk kemi
Magnetism
Magnetism

Publication and Content Type

ref (subject category)
art (subject category)

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