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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Greenberg, Yaron Emuna, Moran Matityahu, Shlomi Yahel, Eyal Makov, Guy |
| Description | Country affiliation: Israel Author Affiliation: Matityahu S ( Department of Physics, NRCN, P.O. Box 9001, Beer-Sheva 84190, Israel.); Emuna M ( Department of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel.); Yahel E ( Department of Physics, NRCN, P.O. Box 9001, Beer-Sheva 84190, Israel.); Makov G ( Department of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel.); Greenberg Y ( Department of Physics, NRCN, P.O. Box 9001, Beer-Sheva 84190, Israel.) |
| Abstract | We present a novel experimental design for high sensitivity measurements of the electrical resistance of samples at high pressures (0-6 GPa) and high temperatures (300-1000 K) in a 'Paris-Edinburgh' type large volume press. Uniquely, the electrical measurements are carried out directly on a small sample, thus greatly increasing the sensitivity of the measurement. The sensitivity to even minor changes in electrical resistance can be used to clearly identify phase transitions in material samples. Electrical resistance measurements are relatively simple and rapid to execute and the efficacy of the present experimental design is demonstrated by measuring the electrical resistance of Pb, Sn, and Bi across a wide domain of temperature-pressure phase space and employing it to identify the loci of phase transitions. Based on these results, the phase diagrams of these elements are reconstructed to high accuracy and found to be in excellent agreement with previous studies. In particular, by mapping the locations of several well-studied reference points in the phase diagram of Sn and Bi, it is demonstrated that a standard calibration exists for the temperature and pressure, thus eliminating the need for direct or indirect temperature and pressure measurements. The present technique will allow simple and accurate mapping of phase diagrams under extreme conditions and may be of particular importance in advancing studies of liquid state anomalies. |
| ISSN | 00346748 |
| Issue Number | 4 |
| Journal | Review of Scientific Instruments |
| Volume Number | 86 |
| e-ISSN | 10897623 |
| Language | English |
| Publisher | American Institute of Physics |
| Publisher Date | 2015-04-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Physics Discipline Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Instrumentation |
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