scholarly journals Hidden quantum phase transition in Mn1−xFexGe evidenced by small-angle neutron scattering

2016 ◽  
Vol 94 (17) ◽  
Author(s):  
E. Altynbaev ◽  
S.-A. Siegfried ◽  
E. Moskvin ◽  
D. Menzel ◽  
C. Dewhurst ◽  
...  
Keyword(s):  
Phase Transition ◽  
Neutron Scattering ◽  
Quantum Phase Transition ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Quantum Phase

Quantum Phase Transition in Spin Dimer Systems

2021 ◽  
Vol 1 ◽  
Keyword(s):  
Phase Transition ◽  
Neutron Scattering ◽  
Quantum Phase Transition ◽  
Magnetic Moment ◽  
Conservation Law ◽  
Quantum Phase ◽  
Total Moment ◽  
Sum Rule ◽  
Spin Dimer

A magnetic moment fluctuates in both longitudinal and transverse directions. The total moment sum rule is a conservation law that can help us resolve data of neutron scattering into the two components.

Necklace-like microstructure in shallow-quenched aqueous solutions of poly(n-isopropylacrylamide), detected by advanced small-angle neutron scattering methods

Soft Matter ◽  
2019 ◽  
Vol 15 (4) ◽  
pp. 671-682 ◽  
Author(s):  
Satoshi Koizumi ◽  
Masahiko Annaka ◽  
Dietmar Schwahn
Keyword(s):  
Phase Transition ◽  
Aqueous Solutions ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Volume Phase Transition ◽  
Volume Phase ◽  
Isopropyl Acrylamide

The microstructure of aqueous poly(N-isopropyl acrylamide) (PNIPA) gel and solution was investigated by small-angle neutron scattering (SANS) in the vicinity of the gel volume phase transition at TV (= 34 °C).

A Small-Angle Neutron Scattering Investigation of the TDMAO Micelle System at High Hydrostatic Pressure

1997 ◽  
Vol 30 (5) ◽  
pp. 739-743 ◽  
Author(s):  
N. Gorski ◽  
J. Kalus ◽  
A. I. Kuklin ◽  
L. S. Smirnov
Keyword(s):  
Phase Transition ◽  
Neutron Scattering ◽  
Phase Ii ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Accurate Determination ◽  
Structural Phase ◽  
Phase Behaviour ◽  
Transition Line ◽  
Pressure Phase

The phase behaviour and phase transition of the tetradecyldimethylaminoxide micellar system TDMAO/ D2O have been investigated by small-angle neutron scattering (SANS) at temperatures T between 287 and 325 K, pressures up to P = 842 MPa and at TDMAO concentrations of 55 and 102 mmol l−1. A pressure-induced structural (shape) phase transition was observed for the whole pressure versus temperature range, with a slope of the transition line of dTm /dP ≃ 0.31° MPa−1. The reversibility and reproducibility of this phase change were tested. The SANS experiments showed a pressure-induced structural phase transition from a low-pressure phase (i), where rod-like micelles with a radius of R = 1.94 ± 0.03 nm were present, to a high-pressure phase (ii). An accurate determination of the structure of phase (ii) has not been possible up to now. In phase (ii), a discrete correlation peak in the Q range 1.8–2.2 nm−1 was found.

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