Artículo
Landau theory for magnetic and structural transitions in CeCo0.85Fe0.15Si
Oropesa, William Gabriel Carreras; Correa, Víctor Félix
; Sereni, Julian Gustavo Renzo
; García García, Jose Daniel
; Cornaglia de la Cruz, Pablo Sebastian
Fecha de publicación:
06/2018
Editorial:
IOP Publishing
Revista:
Journal of Physics: Condensed Matter
ISSN:
0953-8984
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We present a phenomenological analysis of the magnetoelastic properties of CeCo0.85Fe0.15Si at temperatures close to the Néel transition temperature T N. Using a Landau functional we provide a qualitative description of the thermal expansion, magnetostriction, magnetization and specific heat data. We show that the available experimental results (Correa et al 2016 J. Phys.: Condens. Matter 28 346003) are consistent with the presence of a structural transition at and a strong magnetoelastic coupling. The magnetoelastic coupling presents a Janus-faced effect: while the structural transition is shifted to higher temperatures as the magnetic field is increased, the resulting striction at low temperatures decreases. The strong magnetoelastic coupling and the proximity of the structural transition to the onset temperature for magnetic fluctuations, suggest that the transition could be an analogue of the tetragonal to orthorhombic observed in Fe-based pcnictides.
Palabras clave:
LANDAU FUNCTIONAL
,
MAGNETISM
,
MAGNETOSTRICTION
,
PHASE TRANSITIONS
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Colecciones
Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos(UE-INN)
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA
Citación
Oropesa, William Gabriel Carreras; Correa, Víctor Félix; Sereni, Julian Gustavo Renzo; García García, Jose Daniel; Cornaglia de la Cruz, Pablo Sebastian; Landau theory for magnetic and structural transitions in CeCo0.85Fe0.15Si; IOP Publishing; Journal of Physics: Condensed Matter; 30; 29; 6-2018; 1-12
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