76014 20200117212656.0 doi 10.1103/PhysRevB.98.144445 sideral 108927 ART-2018-108927 eng (orcid)0000-0002-8173-1846 Laliena, V. Thermal fluctuations in the conical state of monoaxial helimagnets 2018 Access copy available to the general public Unrestricted The effect of thermal fluctuations on the phase structure of monoaxial helimagnets with external magnetic field parallel to the chiral axis is analyzed by means of a saddle point expansion of the free energy. The phase transition that separates the conical and forced ferromagnetic phases is changed to first order by the thermal fluctuations. In a purely monoaxial system the pitch of the conical state remains independent of temperature and magnetic field, as in mean-field theory, even when fluctuations are taken into account. However, in the presence of weak Dzyaloshinskii-Moriya interactions in the plane perpendicular to the chiral axis, thermal fluctuations induce a dependence of the pitch on temperature and magnetic field. This may serve to determine the nature of magnetic interactions in such systems. info:eu-repo/grantAgreement/ES/MINECO/MAT2015-68200-C2-2-P info:eu-repo/semantics/openAccess by-nc http://creativecommons.org/licenses/by-nc/3.0/es/ 1.502 2018 Electronic, Optical and Magnetic Materials 2018 Q1 Condensed Matter Physics 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Kato, Y. Albalate, G. (orcid)0000-0002-3600-1721 Campo, J. Universidad de Zaragoza 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 98, 14 (2018), 144445 [10 pp] Phys. Rev. B Physical Review B 2469-9950 364397 http://zaguan.unizar.es/record/76014/files/texto_completo.pdf Versión publicada 18889 http://zaguan.unizar.es/record/76014/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:76014 articulos driver 2020-01-17-21:23:11 ARTICLE