Recently, ferroic materials with giant caloric responses emerged as a possible
environmental-friendly alternative for the currently used cooling devices. In our work, we …

New nontoxic and biocompatible ferroelectric materials are a subject undergoing intense
study. One of the most promising research branches is focused on H-bonded organic or …

The temperature and/or entropy of electrically polarisable materials can be altered by
changing electric field E. Research into this electrocaloric (EC) effect has focussed on …

The temperature dependence of the midinfrared reflectivity spectra of ammonium sulfate is
reported for the two polarizations a and c of the electric field of the infrared wave, in the …

Dielectric dispersion of ammonium sulphate in the 4-400 cm-1 range has been investigated
in a broad temperature region around the pseudo-proper ferroelectric transition at T c= 223 …

The temperature dependence of the D modes of partially deuterated NH+ ions in ammonium
sulphate has been investigated with a view to examining the nature of the changes in these …

We have studied the influence of the uniaxial mechanical load σm≤ 200 bar on the spectral
(300-800 nm) and temperature (300-77 K) dependences of the birefringence Δn i and the …

A phenomenological theory accounting for the phase transition in improper ferroelectric
ammonium sulphate has been discussed that is based on a molecular distortion-type …

The temperature dependence of the z (yy) x Raman spectrum was studied in (NH 4) 2 SO 2
single crystal in the temperature range 300-100 K. The temperature dependence of the NH 4 …

Magic-angle 15 N NMR measurements indicate that the nitrogen chemical shift difference for
the two inequivalent ammonium ion sites of (NH 4) 2 SO 4 is only 0.30 ppm in the room …