Inelastic neutron scattering study of the specific features of the phase transitions in (NH4)2WO2F4

Oxyfluoride (NH 4 ) 2 WO 2 F 4 has been studied by the inelastic neutron scattering method over a wide temperature range 10–300 K at two initial neutron energies of 15 and 60 meV. The role of tetrahedral ammonium groups in the mechanism of sequential phase transitions at T 1 = 201 K and T 2 = 160 K...

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Veröffentlicht in:	Physics of the Solid State 2009-11, Vol.51 (11), p.2362-2366
Hauptverfasser:	Smirnov, L. S., Kolesnikov, A. I., Flerov, I. N., Laptash, N. M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Lattice Dynamics and Phase Transitions NEUTRONS OXYFLUORIDES Physics Physics and Astronomy PHYSICS OF ELEMENTARY PARTICLES AND FIELDS SCATTERING Solid State Physics
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Beschreibung
Zusammenfassung:	Oxyfluoride (NH 4 ) 2 WO 2 F 4 has been studied by the inelastic neutron scattering method over a wide temperature range 10–300 K at two initial neutron energies of 15 and 60 meV. The role of tetrahedral ammonium groups in the mechanism of sequential phase transitions at T 1 = 201 K and T 2 = 160 K has been discussed.
ISSN:	1063-7834 1090-6460
DOI:	10.1134/S1063783409110262