Brillouin scattering study of ferroelectric transition mechanism in multiferroic metal-organic frameworks of [NH4][Mn(HCOO)3] and [NH4][Zn(HCOO)3] | Zendy

Mirosław Mączka | Zendy; Maciej Ptak | Zendy; Seiji Kojima | Zendy

Open Access

Brillouin scattering study of ferroelectric transition mechanism in multiferroic metal-organic frameworks of [NH4][Mn(HCOO)3] and [NH4][Zn(HCOO)3]

Author(s) -

Mirosław Mączka,

Maciej Ptak,

Seiji Kojima

Publication year - 2014

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4880815

Subject(s) - brillouin zone , brillouin scattering , ferroelectricity , multiferroics , condensed matter physics , materials science , relaxation (psychology) , scattering , phonon , transition metal , chemistry , optics , dielectric , optoelectronics , physics , laser , psychology , social psychology , biochemistry , catalysis

Temperature dependence of acoustic properties of [NH4][Mn(HCOO)3] and [NH4][Zn(HCOO)3] metal-organic frameworks was investigated by high-resolution micro-Brillouin scattering. Clear anomalies in the Brillouin shift and damping were observed near the transition temperature Tc upon cooling for the acoustic phonon corresponding to the c11 elastic constant. Analysis of the acoustic anomalies showed that the order parameter exhibits critical slowing down near Tc with the relaxation time of similar order of magnitude as for other order-disorder ferroelectrics

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