A magnetic glassy phase in Fe1+ySexTe1-x single crystals (Articolo in rivista)

Type
Label
  • A magnetic glassy phase in Fe1+ySexTe1-x single crystals (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0953-8984/25/15/156004 (literal)
Alternative label
  • G Lamura1, T Shiroka2,3, P Bonfà4, S Sanna5, F Bernardini6, R De Renzi4, R Viennois7,8, E Giannini7, A Piriou7, N Emery9, M R Cimberle1 and M Putti1 (2013)
    A magnetic glassy phase in Fe1+ySexTe1-x single crystals
    in Journal of physics. Condensed matter (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • G Lamura1, T Shiroka2,3, P Bonfà4, S Sanna5, F Bernardini6, R De Renzi4, R Viennois7,8, E Giannini7, A Piriou7, N Emery9, M R Cimberle1 and M Putti1 (literal)
Pagina inizio
  • 156004 (literal)
Pagina fine
  • - (literal)
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  • 25 (literal)
Rivista
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  • 15 (literal)
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  • 1 CNR-SPIN and Università di Genova, Via Dodecaneso 33, I-16146 Genova, Italy 2 Laboratorium für Festkörperphysik, ETH-Hönggerberg, CH-8093 Zürich, Switzerland 3 Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland 4 Dipartimento di Fisica and Unità CNISM di Parma, I-43124 Parma, Italy 5 Dipartimento di Fisica and Unità CNISM di Pavia, I-27100 Pavia, Italy 6 CNR-IOM and Dipartimento di Fisica, Università di Cagliari, I-09042 Monserrato (CA), Italy 7 Département de Physique de la Matière Condensée, Université de Genève, 24 Quai Ernest-Ansermet, CH-1211 Geneva, Switzerland 8 Institut C. Gerhardt, UMR 5253, Université Montpellier II, Place Eugène Bataillon, F-34095 Montpellier, France 9 ICMPE/GESMAT, UMR 7182 CNRS-UPEC, 2-8 Rue Henri Dunant, F-94320 Thiais, France (literal)
Titolo
  • A magnetic glassy phase in Fe1+ySexTe1-x single crystals (literal)
Abstract
  • The evolution of magnetic order in Fe1+ySexTe1-x crystals as a function of Se content was investigated by means of ac/dc magnetometry and muon-spin spectroscopy. Experimental results and self-consistent density functional theory calculations both indicate that muons are implanted in vacant iron-excess sites, where they probe a local field mainly of dipolar origin, resulting from an antiferromagnetic (AFM) bicollinear arrangement of iron spins. This long-range AFM phase becomes progressively disordered with increasing Se content. At the same time all the tested samples manifest a marked glassy character that vanishes for high Se contents. The presence of local electronic/compositional inhomogeneities most likely favours the growth of clusters whose magnetic moment 'freezes' at low temperature. This glassy magnetic phase justifies both the coherent muon precession seen at short times in the asymmetry data, as well as the glassy behaviour evidenced by both dc and ac magnetometry. (literal)
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