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Title: Manometer extension for high pressure measurement: Nuclear quadrupole resonance study of Cu{sub 2}O with a modified Bridgman anvil cell up to 10 GPa

Abstract

We report {sup 63}Cu nuclear quadrupole resonance (NQR) measurement of Cu{sub 2}O under pressure up to about 10 GPa at low temperatures. Because the lattice parameter of Cu{sub 2}O changes with increasing pressure, the electric field gradient at the Cu site also changes correspondingly with pressure. This enables us to use the Cu{sub 2}O as an in situ manometer for high pressure nuclear magnetic resonance/NQR up to about 9 GPa.

Authors:
; ; ; ; ; ;  [1];  [2];  [2];  [2];  [2];  [2]
  1. Graduate School of Science and Technology, Chiba University, Chiba 263-8522, Japan and Department of Physics, Chiba University, Chiba 263-8522 (Japan)
  2. (Japan)
Publication Date:
OSTI Identifier:
20953246
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 78; Journal Issue: 1; Other Information: DOI: 10.1063/1.2426875; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COPPER 63; COPPER OXIDES; ELECTRIC FIELDS; LATTICE PARAMETERS; NUCLEAR MAGNETIC RESONANCE; NUCLEAR QUADRUPOLE RESONANCE; PRESSURE GAGES; PRESSURE MEASUREMENT; PRESSURE RANGE GIGA PA

Citation Formats

Fukazawa, H., Yamatoji, N., Kohori, Y., Terakura, C., Takeshita, N., Tokura, Y., Takagi, H., Graduate School of Science and Technology, Chiba University, Chiba 263-8522, Graduate School of Science and Technology, Chiba University, Chiba 263-8522, Japan and Department of Physics, Chiba University, Chiba 263-8522, Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Japan and Department of Applied Physics, University of Tokyo, Tokyo 113-8656, and Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Japan and Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8581. Manometer extension for high pressure measurement: Nuclear quadrupole resonance study of Cu{sub 2}O with a modified Bridgman anvil cell up to 10 GPa. United States: N. p., 2007. Web. doi:10.1063/1.2426875.
Fukazawa, H., Yamatoji, N., Kohori, Y., Terakura, C., Takeshita, N., Tokura, Y., Takagi, H., Graduate School of Science and Technology, Chiba University, Chiba 263-8522, Graduate School of Science and Technology, Chiba University, Chiba 263-8522, Japan and Department of Physics, Chiba University, Chiba 263-8522, Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Japan and Department of Applied Physics, University of Tokyo, Tokyo 113-8656, & Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Japan and Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8581. Manometer extension for high pressure measurement: Nuclear quadrupole resonance study of Cu{sub 2}O with a modified Bridgman anvil cell up to 10 GPa. United States. doi:10.1063/1.2426875.
Fukazawa, H., Yamatoji, N., Kohori, Y., Terakura, C., Takeshita, N., Tokura, Y., Takagi, H., Graduate School of Science and Technology, Chiba University, Chiba 263-8522, Graduate School of Science and Technology, Chiba University, Chiba 263-8522, Japan and Department of Physics, Chiba University, Chiba 263-8522, Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Japan and Department of Applied Physics, University of Tokyo, Tokyo 113-8656, and Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Japan and Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8581. Mon . "Manometer extension for high pressure measurement: Nuclear quadrupole resonance study of Cu{sub 2}O with a modified Bridgman anvil cell up to 10 GPa". United States. doi:10.1063/1.2426875.
@article{osti_20953246,
title = {Manometer extension for high pressure measurement: Nuclear quadrupole resonance study of Cu{sub 2}O with a modified Bridgman anvil cell up to 10 GPa},
author = {Fukazawa, H. and Yamatoji, N. and Kohori, Y. and Terakura, C. and Takeshita, N. and Tokura, Y. and Takagi, H. and Graduate School of Science and Technology, Chiba University, Chiba 263-8522 and Graduate School of Science and Technology, Chiba University, Chiba 263-8522, Japan and Department of Physics, Chiba University, Chiba 263-8522 and Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562 and Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Japan and Department of Applied Physics, University of Tokyo, Tokyo 113-8656 and Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Japan and Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8581},
abstractNote = {We report {sup 63}Cu nuclear quadrupole resonance (NQR) measurement of Cu{sub 2}O under pressure up to about 10 GPa at low temperatures. Because the lattice parameter of Cu{sub 2}O changes with increasing pressure, the electric field gradient at the Cu site also changes correspondingly with pressure. This enables us to use the Cu{sub 2}O as an in situ manometer for high pressure nuclear magnetic resonance/NQR up to about 9 GPa.},
doi = {10.1063/1.2426875},
journal = {Review of Scientific Instruments},
number = 1,
volume = 78,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}
  • Using a cryogenic diamond anvil cell (DAC) the pressure dependence of the superconducting transition temperature {ital T}{sub {ital c}} of Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{ital y}} (Tl-2223) and Tl{sub 2}Ba{sub 2}Ca{sub 3}Cu{sub 4}O{sub 12+{ital y}} (Tl-2234) has been measured resistively up to 21 GPa. At ambient pressure these compounds have {ital T}{sub {ital c}}{close_quote}s of 128.5 K and 113 K. At low pressures, the pressure dependence {partial_derivative}{ital T}{sub {ital c}}/{partial_derivative}{ital p} is 1.75 K/GPa in Tl-2223 and 2.0 K/GPa in Tl-2234. As pressure is increased {ital T}{sub {ital c}} continues to increase (although the rate diminishes) until {ital T}{submore » {ital c}} reaches a maximum of 133 K at 4.2 GPa in Tl-2223 and of 120 K at 6.6 GPa in Tl-2234. At higher pressures {ital T}{sub {ital c}} decreases. In this region a rather abrupt change in {partial_derivative}{ital T}{sub {ital c}}/{partial_derivative}{ital p} is observed at {ital p}{sub {ital c}}=12.0 GPa in Tl-2223 and at {ital p}{sub {ital c}}=10.5 GPa in Tl-2234. The kink at {ital p}{sub {ital c}} is interpreted as an indication of the presence of {ital inequivalent} CuO{sub 2} layers: Below {ital p}{sub {ital c}} the {ital T}{sub {ital c}} of the samples is determined by the intrinsic {ital T}{sub {ital c}} of the outer CuO{sub 2} layers while above {ital p}{sub {ital c}} it is determined by that of the inner CuO{sub 2} layers. {copyright} {ital 1996 The American Physical Society.}« less
  • By performing experiments on samples as pure as presently available, the origin of the reported pressure-induced {ital T}{sub {ital c}} values well above 150 K in the mercury-based high-{ital T}{sub {ital c}} superconductors has been investigated. For HgBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 8+{ital y}} (Hg-1223) maximum {ital T}{sub {ital c}} values between 142 K and 146 K are obtained under pressure up to 30 GPa, while for HgBa{sub 2}Ca{sub 3}Cu{sub 4}O{sub 10+{ital y}} (Hg-1234) {ital T}{sub {ital c}} never exceeds 121 K. To verify the reproducibility between different laboratories the pressure dependence of a sample from the same batch as themore » sample on which Nu{tilde n}ez-Regueiro reported a {ital T}{sub {ital c}} value of 157 K at 23.5 GPa has also been measured. Below 10 GPa the agreement with his results is rather good and a possible explanation for the disagreement above 10 GPa is given. It appears that the reported high {ital T}{sub {ital c}} values in non-single-phase Hg-1223 samples are due to the presence of Hg-1234 phase impurities. Also some of the adopted definitions of {ital T}{sub {ital c}} have led to somewhat optimistic values of {ital T}{sub {ital c}}: The high-pressure results on Hg-1223 found in the literature are therefore reviewed and reanalyzed. {copyright} {ital 1996 The American Physical Society.}« less
  • Nuclear magnetic resonance (NMR) experiments are reported at up to 30.5 GPa of pressure using radiofrequency (RF) micro-coils with anvil cell designs. These are the highest pressures ever reported with NMR, and are made possible through an improved gasket design based on nano-crystalline powders embedded in epoxy resin. Cubic boron-nitride (c-BN), corundum (α-Al{sub 2}O{sub 3}), or diamond based composites have been tested, also in NMR experiments. These composite gaskets lose about 1/2 of their initial height up to 30.5 GPa, allowing for larger sample quantities and preventing damages to the RF micro-coils compared to precipitation hardened CuBe gaskets. It ismore » shown that NMR shift and resolution are less affected by the composite gaskets as compared to the more magnetic CuBe. The sensitivity can be as high as at normal pressure. The new, inexpensive, and simple to engineer gaskets are thus superior for NMR experiments at high pressures.« less
  • The /sup 65/Cu and /sup 63/Cu zero-field nuclear quadrupole resonance (NQR), nuclear magnetic resonance (NMR) at 4.7 and 8.5 T and the spin-lattice relaxation time T/sub 1/ at 8.5 T are measured in the superconducting oxide YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ between 80 and 300 K. No sign of magnetic order or localized moments are found. The NQR linewidth is strongly dependent on the oxygen content. We assign the /sup 63/Cu NQR line at 22 MHz to the Cu site with oxygen coordination 5. T/sub 1/ is dominated by the quadrupolar relaxation due to spin-phonon coupling.
  • We report data on the Gaussian transverse relaxation rate 1/T{sub 2G}, the Knight shift K{sup s}, and the spin-lattice relaxation time T{sub 1}, in YBa{sub 2}Cu{sub 4}O{sub 8} from 100 K up to 715 K, extending the upper temperature of previous studies by 200 K. The T{sub 2G} data are corrected for a small spin-lattice fluctuation contribution to the echo decay. Calculations of T{sub 1}T/T{sub 2G} and T{sub 1}T/T{sub 2G}{sup 2} show that there is a crossover in scaling behavior at a temperature T{sub cr}{approximately}500K. The Knight-shift data also exhibit a maximum at this temperature and decrease slowly with increasingmore » temperature above this. Calculations using an independent form for the susceptibility due to Sokol, Singh, and Elstner suggest that the correlation length for antiferromagnetic fluctuations is on the order of one to two lattice spacings at this crossover temperature, in agreement with the proposal of Barzykin and Pines. {copyright} {ital 1997} {ital The American Physical Society}« less