Calibration of the Ruby-Pressure-Scale at Low Temperatures

Noack, René; Holzapfel, W. B.

doi:10.1007/978-1-4684-7470-1_98

Cited by 41 publications

(12 citation statements)

References 10 publications

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“…A second ruby chip at ambient pressure located just outside the pressure cell allows the correction for the temperature shift of the ruby line. In the temperature range of this experiment (2 -300 K) the pressure-dependent shift in the wavelength of the ruby R1 fluorescence line, dλ/dP = 3.642Å/GPa, is independent of temperature [14]. Upon cooling from room temperature, there is negligible change in pressure below 50 K; the pressure is normally measured at temperatures close to the temperature of MgB 2 's superconducting transition.…”

Section: Methodsmentioning

confidence: 79%

Dependence of the superconducting transition temperature of MgB2 on pressure to 20 GPa

Deemyad

Schilling

Jorgensen

et al. 2001

Physica C: Superconductivity

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The dependence of T c on nearly hydrostatic pressure has been measured for an isotopically pure ( 11 B) MgB 2 sample in a helium-loaded diamond-anvil-cell to nearly 20 GPa. T c decreases monotonically with pressure from 39.1 K at ambient pressure to 20.9 K at 19.2 GPa. The initial dependence is the same as that obtained earlier (dT c /dP ≃ −1.11(2) K/GPa) on the same sample in a He-gas apparatus to 0.7 GPa. The observed pressure dependence T c (P ) to 20 GPa can be readily described in terms of simple lattice stiffening within standard phonon-mediated BCS superconductivity.

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Section: Methodsmentioning

confidence: 79%

Dependence of the superconducting transition temperature of MgB2 on pressure to 20 GPa

Deemyad

Schilling

Jorgensen

et al. 2001

Physica C: Superconductivity

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“…PS of R-line of MgO:Cr 3+ was measured at room temperature and up to pressure below 60 kbar, and the R-line PS rate was given as 0.437 Å/kbar. [1] However, according to experimental results, PS of R 1 -line of ruby does not depend on temperature, [7] and in the temperature interval 25 • C ∼ 200 • C and pressure interval 0 ∼ 40 kbar, the temperature and pressure coefficients of the shift of ruby R 1 -line were found to be independent of each other. [8] Similarly, therefore, the aforementioned observed result of PS of R-line of MgO:Cr 3+ given by Ref.…”

Section: Dqmentioning

confidence: 91%

Pressure-Induced Shift of R-Line of MgO:Cr ³⁺ with Electron-Phonon Interaction Effect

Zhang

2007

Commun. Theor. Phys.

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By means of improved ligand-field theory, the ``pure electronic" pressure-induced shift (PS) and the PS due to electron-phonon interaction (EPI) of R-line of MgO:Cr3+ have been calculated, respectively. The calculated results are in very good agreement with the experimental data. The behaviors of the pure electronic PS of R-line of MgO:Cr3+ and the PS of its R-line due to EPI are different. It is the combined effect of them that gives rise to the total PS of R-line, which has satisfactorily explained the experimental results. The comparison between the feature of R-line PS of MgO:Cr3+ and that of R1-line PS of ruby has been made.

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“…1a) was loaded into a hole (180 mm diameter) in an SUS gasket with helium as the pressure medium to give the ac plane perpendicular to the incident X-ray beam. The diamond anvil cell (DAC) was mounted in a closed-cycle helium refrigerator and the pressure was determined by the ruby luminescence method (Noack & Holzapfel, 1979;Nakano et al, 2000). The sample pressure was regulated by a helium gas compression system.…”

Section: Methodsmentioning

confidence: 99%

Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta₂NiSe₅

Nakano

Sugawara

Tamura

et al. 2018

IUCrJ

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The crystal structure of the excitonic insulator Ta 2 NiSe 5 has been investigated under a range of pressures, as determined by the complementary analysis of both single-crystal and powder synchrotron X-ray diffraction measurements. The monoclinic ambient-pressure excitonic insulator phase II transforms upon warming or under a modest pressure to give the semiconducting C-centred orthorhombic phase I. At higher pressures (i.e. >3 GPa), transformation to the primitive orthorhombic semimetal phase III occurs. This transformation from phase I to phase III is a pressure-induced first-order phase transition, which takes place through coherent sliding between weakly coupled layers. This structural phase transition is significantly influenced by Coulombic interactions in the geometric arrangement between interlayer Se ions. Furthermore, upon cooling, phase III transforms into the monoclinic phase IV, which is analogous to the excitonic insulator phase II. Finally, the excitonic interactions appear to be retained despite the observed layer sliding transition.

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Calibration of the Ruby-Pressure-Scale at Low Temperatures

Cited by 41 publications

References 10 publications

Dependence of the superconducting transition temperature of MgB2 on pressure to 20 GPa

Dependence of the superconducting transition temperature of MgB2 on pressure to 20 GPa

Pressure-Induced Shift of R-Line of MgO:Cr ³⁺ with Electron-Phonon Interaction Effect

Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta₂NiSe₅

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Calibration of the Ruby-Pressure-Scale at Low Temperatures

Cited by 41 publications

References 10 publications

Dependence of the superconducting transition temperature of MgB2 on pressure to 20 GPa

Dependence of the superconducting transition temperature of MgB2 on pressure to 20 GPa

Pressure-Induced Shift of R-Line of MgO:Cr 3+ with Electron-Phonon Interaction Effect

Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta2NiSe5

Contact Info

Product

Resources

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Pressure-Induced Shift of R-Line of MgO:Cr ³⁺ with Electron-Phonon Interaction Effect

Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta₂NiSe₅