Elastic and inelastic neutron scattering studies on the tetragonal to orthorhombic phase transition of La2?x Sr x CuO4�?

1994 ◽  
Vol 94 (1-2) ◽  
pp. 29-37 ◽  
Author(s):  
M. Braden ◽  
W. Schnelle ◽  
W. Schwarz ◽  
N. Pyka ◽  
G. Heger ◽  
...  
Keyword(s):  
Phase Transition ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Orthorhombic Phase ◽  
Inelastic Neutron

NH3 reorientation in phases I, II, and III of Ni(NH3)6(NO3)2

1988 ◽  
Vol 66 (4) ◽  
pp. 692-697 ◽  
Author(s):  
Gordon J. Kearley ◽  
Herma Blank
Keyword(s):  
Phase Transition ◽  
Neutron Scattering ◽  
Strong Interaction ◽  
Rotational Motion ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Phase Iii ◽  
Single Type ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering

The inelastic neutron scattering (INS) spectra of rotational tunnelling and librations of NH3 ligands in phase III of Ni(NH3)6(NO3)2 are not consistent with a rotational hindrance potential containing only cos [Formula: see text] terms owing to strong interaction between neighboring cations. This type of interaction, and motion of the whole cation, also influences the classical reorientational motions involving displacement of the H atoms, where the overall radius of rotation is consistently greater than the 0.9 Å expected for isolated NH3 rotors. Quasielastic neutron scattering (QNS) suggests that in phase III there are two sublattices of cations, one of which becomes completely disordered (with respect to the NH3 rotors) at the III–II phase transition. Disorder of the second sublattice marks the II–I transformation where only a single type of rotational motion is found.

scholarly journals Phase transition in C2O4DND4, [Formula: see text]D2O : a coherent inelastic neutron scattering study

1992 ◽  
Vol 2 (3) ◽  
pp. 329-351 ◽  
Author(s):  
M. Krauzman ◽  
M. Debeau ◽  
R. M. Pick ◽  
M. Quilichini ◽  
P. Launois ◽  
...  
Keyword(s):  
Phase Transition ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Scattering Study ◽  
Neutron Scattering Study

Pressure- and temperature-dependent inelastic neutron scattering study of the phase transition and phonon lattice dynamics in para-terphenyl

2021 ◽  
Author(s):  
Qingan Cai ◽  
Michael McIntire ◽  
Luke L. Daemen ◽  
Chen Li ◽  
Eric L. Chronister
Keyword(s):  
Phase Transition ◽  
Neutron Scattering ◽  
Temperature Dependence ◽  
Lattice Dynamics ◽  
Inelastic Neutron Scattering ◽  
Ambient Pressure ◽  
Inelastic Neutron ◽  
Temperature Dependent ◽  
Scattering Study ◽  
Neutron Scattering Study

Inelastic neutron scattering has been performed on para-terphenyl at temperatures from 10 to 200 K and under pressures from the ambient pressure to 1.51 kbar. The temperature dependence of phonons,...

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