Hydrostatic pressure effect on the structural phase transitions in Ni–Mn–Ga alloy

2012 ◽  
Vol 67 (1) ◽  
pp. 263-265 ◽  
Author(s):  
P.I. Polyakov ◽  
V.V. Slyusarev ◽  
S.M. Konoplyuk ◽  
V.V. Kokorin ◽  
Yu.S. Semenova
Keyword(s):  
Phase Transitions ◽  
Hydrostatic Pressure ◽  
Pressure Effect ◽  
Structural Phase ◽  
Structural Phase Transitions

NQR study of the structural phase transitions in a system with reduced effective dimensionality: K2ReCl6

1983 ◽  
Vol 61 (10) ◽  
pp. 1374-1381 ◽  
Author(s):  
Marie D'Iorio ◽  
Robin L. Armstrong
Keyword(s):  
Fourier Transform ◽  
Phase Transitions ◽  
Hydrostatic Pressure ◽  
Magnetic Resonance ◽  
Structural Phase ◽  
Nonlinear Phenomena ◽  
Structural Phase Transitions ◽  
Quadrupole Resonance ◽  
Nuclear Quadrupole ◽  
Effective Dimensionality

Chlorine 35 nuclear quadrupole resonance (NQR) frequency and lineshape data, obtained with a Fourier transform magnetic resonance spectrometer, are presented for the antifluorite crystal K2ReCl6. In the temperature range investigated, 85 to 130 K, two structural phase transitions occur which reduce the crystal symmetry from cubic to tetragonal to monoclinic. The variation of the NQR spectrum with temperature and with hydrostatic pressure up to 2.64 kbar is documented. The structure of the spectrum and the intensity distribution within it are unexpected from previous studies of antifluorite systems. An explanation of the results is given which is based on recent discussions of nonlinear phenomena at phase transitions in crystals exhibiting reduced effective dimensionality.

Non-Hydrostatic Pressure Induced Structural Phase Transitions of Silicon Analyzed by Raman Scattering

2006 ◽  
Vol 258-260 ◽  
pp. 276-281 ◽  
Author(s):  
Paulo S. Pizani ◽  
Renato G. Jasinevicius ◽  
Ricardo A. Zanatta
Keyword(s):  
Phase Transitions ◽  
Hydrostatic Pressure ◽  
Single Point ◽  
Structural Phase ◽  
Rf Sputtering ◽  
Diamond Turning ◽  
Machining Process ◽  
Structural Phase Transitions ◽  
Machined Surface ◽  
Amorphous Surface

In this work a study on the structural phase transitions of silicon undergone by two different methods were performed. The samples were submitted to high non-hydrostatic pressure applied by cyclic Vickers indentations and by the tool tip during the single point diamond turning. The indentations were performed on virgin surface (polished as received) and on an amorphous surface generated either by the machining process or RF sputtering. The analysis on the machined surface, debris on the diamond tool and around of imprints were also performed using Raman micro spectroscopy. The results indicated the formation of some phases may depend upon the initial structural state of the surface, i.e., amorphous or crystalline.

Structural phase transitions in flexible DUT-8(Ni) under high hydrostatic pressure

2022 ◽  
Author(s):  
Alexander S. Krylov ◽  
Irina Dmitrievna Yushina ◽  
Evgenia A. Slyusareva ◽  
Svetlana Krylova ◽  
Alexander Vtyurin ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Hydrostatic Pressure ◽  
High Hydrostatic Pressure ◽  
Metal Organic Framework ◽  
Structural Phase ◽  
Structural Phase Transitions ◽  
Metal Organic ◽  
Closed Pore ◽  
Organic Framework

The behaviours of the open pore (op) and closed pore (cp) phases of flexible [Ni2(ndc)2(dabco)]n (ndc – 2,6-naphthalene dicarboxylate, dabco -- 1,4-diazabicyclo[2.2.2]octane, DUT-8(Ni)) metal-organic framework under high hydrostatic pressure up...

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