Year: 2006
Type: article
Abstract: Strong anomalies of the thermal expansion coefficients at the magnetic and ferroelectric transitions have been detected in multiferroic $R{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$. Their correlation with anomalies of the specific heat and the dielectric constant is discussed. The results provide evidence for the magnetic origin of the ferroelectricity mediated by strong spin-lattice coupling in the compounds. Neutron scattering data for $\mathrm{Ho}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$ indicate a spin reorientation at the two low-temperature phase transitions.
Source: Physical Review B
Institutions: University of Houston, Bulgarian Academy of Sciences, Georgi Nadjakov Institute of Solid State Physics, Lawrence Berkeley National Laboratory, Hong Kong University of Science and Technology, National Institute of Standards and Technology, NIST Center for Neutron Research, Rutgers, The State University of New Jersey
Language: Latvian
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2015010039