Nucleation, instability, and discontinuous phase transitions in monoaxial helimagnets with oblique fields
Laliena, V. ; Campo, J. (Universidad de Zaragoza) ; Kousaka, Y.
Resumen: The phase diagram of the monoaxial chiral helimagnet as a function of temperature (T) and magnetic field with components perpendicular (Hx) and parallel (Hz) to the chiral axis is theoretically studied via the variational mean-field approach in the continuum limit. A phase transition surface in the three-dimensional thermodynamic space separates a chiral spatially modulated phase from a homogeneous forced ferromagnetic phase. The phase boundary is divided into three parts: two surfaces of second-order transitions of instability and nucleation type, in DeGennes terminology, are separated by a surface of first-order transitions. Two lines of tricritical points separate the first-order surface from the second-order surfaces. The divergence of the period of the modulated state on the nucleation transition surface has a logarithmic behavior typical of a chiral soliton lattice. The specific heat diverges on the nucleation surface as a power law with logarithmic corrections, while it shows a finite discontinuity on the other two surfaces. The soliton density curves are described by a universal function of Hx if the values of T and Hz determine a transition point lying on the nucleation surface; otherwise, they are not universal.
Idioma: Inglés
DOI: 10.1103/PhysRevB.95.224410
Año: 2017
Publicado en: Physical Review B 95 (2017), 224410 [9 pp]
ISSN: 2469-9950
Factor impacto JCR: 3.813 (2017)
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 18 / 67 = 0.269 (2017) - Q2 - T1
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2015-68200-C2-2-P
Tipo y forma: Article (Published version)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
Exportado de SIDERAL (2018-07-23-11:30:05)
Visitas y descargas
Idioma: Inglés
DOI: 10.1103/PhysRevB.95.224410
Año: 2017
Publicado en: Physical Review B 95 (2017), 224410 [9 pp]
ISSN: 2469-9950
Factor impacto JCR: 3.813 (2017)
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 18 / 67 = 0.269 (2017) - Q2 - T1
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2015-68200-C2-2-P
Tipo y forma: Article (Published version)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2018-07-23-11:30:05)
Permalink:
Visitas y descargas
Este artículo se encuentra en las siguientes colecciones:
Articles
Record created 2017-09-08, last modified 2018-07-23