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Cycloidal magnetic ...
Cycloidal magnetic order in the compound IrMnSi
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- Eriksson, Therese (författare)
- Uppsala universitet,Institutionen för materialkemi
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- Bergqvist, Lars, 1976- (författare)
- Uppsala universitet,Fysiska institutionen
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- Burkert, T. (författare)
- Uppsala universitet,Fysiska institutionen
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- Felton, S. (författare)
- Uppsala universitet,Institutionen för teknikvetenskaper
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- Nordblad, Per (författare)
- Uppsala universitet,Institutionen för teknikvetenskaper
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- Eriksson, Olle (författare)
- Uppsala universitet,Fysiska institutionen
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- Andersson, Yvonne (författare)
- Uppsala universitet,Institutionen för materialkemi
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- Tellgren, Roland (författare)
- Uppsala universitet,Institutionen för materialkemi
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(creator_code:org_t)
- 2005
- 2005
- Engelska.
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Ingår i: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 71:17
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- A new compound, IrMnSi, has been synthesized, and its crystal structure and magnetic properties have been investigated by means of neutron powder diffraction, magnetization measurements, and first-principles theory. The crystal structure is found to be of the TiNiSi type (ordered Co2P, space groupPnma). The Mn-projected electronic states are situated at the Fermi level, giving rise to metallic binding, whereas a certain degree of covalent character is observed for the chemical bond between the Ir and Si atoms. A cycloidal, i.e., noncollinear, magnetic structure was observed below 460 K, with the propagation vector q=[0,0,0.4530(5)] at 10 K. The magnetism is dominated by large moments on the Mn sites, 3.8μB∕atom from neutron diffraction. First-principles theory reproduces the propagation vector of the experimental magnetic structure as well as the angles between the Mn moments. The calculations further result in a magnetic moment of 3.2μB for the Mn atoms, whereas the Ir and Si moments are negligible, in agreement with observations. A calculation that more directly incorporates electron-electron interactions improves the agreement between the theoretical and experimental magnetic moments. A band mechanism is suggested to explain the observed magnetic order.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
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- art (ämneskategori)
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