Ruby pressure scale in a low-temperature diamond anvil cell

Yamaoka, H.; Zekko, Yumiko; Jarrige, Ignace; Lin, Jung‐Fu; Hiraoka, Nozomu; Ishii, Hirofumi; Tsuei, Ku‐Ding; Мizuki, J.

doi:10.1063/1.4769305

Cited by 47 publications

(18 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pressure was monitored by the ruby fluorescence method. [44][45][46] We performed high-pressure experiments to find the pressure range where superconductivity appears and further pressure beyond.…”

Section: Experiments and Methodsmentioning

confidence: 99%

Electronic structures and spin states of BaFe2As2 and SrFe2As2 probed by x-ray emission spectroscopy at Fe an

et al. 2017

Self Cite

View full text Add to dashboard Cite

Electronic structures of electron-and hole-doped BaFe2As2 and non-doped SrFe2As2 have been studied systematically by x-ray emission spectroscopy at Fe and As K-absorption edges. The electron-and hole-doping causes slight increase of the integrated absolute difference (IAD) values of the Fe Kβ x-ray emission spectra which correlate to the local magnetic moment. Pressure decreases the IAD values and local magnetic moment, and induces the lower-spin states in these compounds. The pre-edge peak intensity of the XAS spectra at the Fe K-absorption edge increases with pressure in both compounds. This indicates an increase of the Fe 3d-As 4p hybridization. It was found that pressure induced a discontinuous increase of the pre-peak intensity of the PFY-XAS spectra at the As K-absorption edge at low pressures in the BaFe2As2 systems. Our results may suggest that the Fe 3d-As 4p hybridization plays a key role in suppressing the AFM order by the doping or pressure and fluctuation of the local magnetic moment and the electron-electron correlation may also play a role on the physical properties of the iron superconductors.

show abstract

Section: Experiments and Methodsmentioning

confidence: 99%

Electronic structures and spin states of BaFe2As2 and SrFe2As2 probed by x-ray emission spectroscopy at Fe an

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…6 near here…] Pressure in cryostats/DACs can be controlled remotely at low temperature by either helium compressed diaphragm (membrane) control, or mechanical means (gearbox, lever arm assembly). The pressure at cryogenic temperatures can be measured with online ruby/Raman systems [107,115], or using x-ray diffraction standards such as Au, NaCl, or MgO. Temperature of the sample in a cryostat is typically controlled by adjusting the flow rate of cryogen into the cryostat and a heating wire attached to a proportional-integral-derivative (PID) control loop.…”

Section: Cryogenic Temperaturesmentioning

confidence: 99%

High-pressure studies with x-rays using diamond anvil cells

2016

View full text Add to dashboard Cite

Pressure profoundly alters all states of matter. The symbiotic development of ultrahighpressure diamond anvil cells, to compress samples to sustainable multi-megabar pressures; and synchrotron x-ray techniques, to probe materials' properties in situ, has enabled the exploration of rich high-pressure (HP) science. In this article, we first introduce the essential concept of diamond anvil cell technology, together with recent developments and its integration with other extreme environments. We then provide an overview of the latest developments in HP synchrotron techniques, their applications, and current problems, followed by a discussion of HP scientific studies using x-rays in the key multidisciplinary fields. These HP studies include: HP x-ray emission spectroscopy, which provides information on the filled electronic states of HP samples; HP x-ray Raman spectroscopy, which probes the HP chemical bonding changes of light elements; HP electronic inelastic x-ray scattering spectroscopy, which accesses high energy electronic phenomena, including electronic band structure, Fermi surface, excitons, plasmons, and their dispersions; HP resonant inelastic x-ray scattering spectroscopy, which probes shallow core excitations, multiplet structures, and spin-resolved electronic structure; HP nuclear resonant x-ray spectroscopy, which provides phonon densities of state and time-resolved Mössbauer information; HP x-ray imaging, which provides information on hierarchical structures, dynamic processes, and internal strains; HP x-ray diffraction, which determines the fundamental structures and densities of single-crystal, polycrystalline, nanocrystalline, and non-crystalline materials; and HP radial x-ray diffraction, which yields deviatoric, elastic and rheological information. Integrating these tools with hydrostatic or uniaxial pressure media, laser and resistive heating, and cryogenic cooling, has enabled investigations of the structural, vibrational, electronic, and magnetic properties of materials over a wide range of pressure-temperature conditions.

show abstract

“…In the early 1970s, the process was turned around somewhat, and the details of crystal field theory were overtaken by empirical advances. In particular, calibrated experimental determination of shifts in the R1 and R2 line energies, , as a function of hydrostatic pressure [16][17][18][19][20][21][22] became the standard method for measuring pressure in high-pressure experiments involving the diamond anvil cell (DAC)-a method that continues to this day [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37], although not without debate regarding calibration coefficients. (Here and throughout, citations within a topic are given in chronological order of publication.)…”

Section: Introductionmentioning

confidence: 99%

Review: Coefficients for Stress, Temperature, and Composition Effects in Fluorescence Measurements of Alumina

Cook

Michaels

2017

J. RES. NATL. INST. STAN.

View full text Add to dashboard Cite

The numerical coefficients linearly relating the effects of stress (including pressure), temperature, and composition to shifts in the energies of the Cr-related fluorescence in alumina (Al2O3) are reviewed. The primary focus is the shift of the R1 and R2 “ruby” fluorescence lines under conditions typical for stress determination in polycrystalline Al2O3. No significant experimental difference in the R1 and R2 responses is observed for hydrostatic stress (or pressure) conditions (average shift coefficient of about 7.6 cm−1/GPa), changes in temperature (about 0.140 cm−1/K), or variations in composition (about 120 cm−1/mass fraction of Cr). There are significant differences in the R1 and R2 responses for nonhydrostatic stress conditions. In particular, for uniaxial stress along the a and c directions in the Al2O3 crystal, the R1 piezospectroscopic tensor coefficients (about 3.0 cm−1/GPa and 1.6 GPa cm−1/GPa, respectively) differ considerably, whereas the R2 coefficients (about 2.6 cm−1/GPa and 2.3 GPa cm−1/GPa, respectively) do not. Measurements of the piezospectroscopic tensor coefficients are shown to have interlaboratory relative consistency of about 4 % extending over 30 years, and are consistent with the scalar high-pressure measurements. Measurements of the temperature coefficients are shown to have interlaboratory relative consistency less than 1 % extending over 60 years. Fluorescence-based measurements of stress in polycrystalline Al2O3, although requiring temperature adjustment, are shown to have a relative uncertainty of about 2.5 %.

show abstract

Ruby pressure scale in a low-temperature diamond anvil cell

Cited by 47 publications

References 40 publications

Electronic structures and spin states of BaFe2As2 and SrFe2As2 probed by x-ray emission spectroscopy at Fe an

Electronic structures and spin states of BaFe2As2 and SrFe2As2 probed by x-ray emission spectroscopy at Fe an

High-pressure studies with x-rays using diamond anvil cells

Review: Coefficients for Stress, Temperature, and Composition Effects in Fluorescence Measurements of Alumina

Contact Info

Product

Resources

About