A new high pressure and temperature equation of state of fcc cobalt
- Department of Earth and Space Science, University of California Los Angeles, Los Angeles, California 90095 (United States)
The high pressure and temperature equation of state of cobalt metal in the face-centered cubic phase was measured up to 57 GPa and 2400 K using the laser heated diamond anvil cell in conjunction with synchrotron X-ray diffraction. The measured region is bisected by a ferromagnetic to paramagnetic transition across the Curie temperature necessitating use of an equation of state that incorporates a 2nd order phase transition within its formalism. A third order Birch-Murnaghan equation of state with a Mie-Grüneisen-Debye thermal correction and a Hillert-Jarl magnetic correction is employed to describe the data above and below the Curie temperature. We find best fit parameters of V{sub 0} = 6.753 (fixed) cm{sup 3}/mol, K{sub 0} = 196 (3) GPa, K′ = 4.7 (2), γ{sub 0} = 2.00 (11), q = 1.3 (5), and θ{sub 0} = 385 K (fixed)
- OSTI ID:
- 22492948
- Journal Information:
- Journal of Applied Physics, Vol. 118, Issue 19; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Compression of liquid Ni and Co under extreme conditions explored by x-ray absorption spectroscopy
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journal | November 2019 |
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