Phase transition of a second kind in nickel as observed through optical reflection under pressure |
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Authors: | Moris Sudai Noaz Nissim Shalom Eliezer |
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Affiliation: | 1. Physics Division, Soreq Nuclear Research Center, Yavne, Israel;2. Institute of Nuclear Fusion Guillermo Velarde, Polytechnic University of Madrid, Madrid, Spain |
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Abstract: | The magnetic permeability of materials at optical frequencies is usually suggested in the literature to be . In this case one cannot expect to measure the magnetic second order phase transition at optical frequencies. The main novel idea of this paper is that the magnetic permeability μ is not equal to 1 for optical frequency and a phase transition of magnetism was measured experimentally with an optical frequency. In particular, this work presents the detection of a magnetic second order phase transition in nickel with temperature and at different pressures, by reflectivity measurements at an optical frequency. Based on our experiments the magnetic permeability is calculated as a function of temperature for pressures of 0.3, 5 and 10 GPa attained in a diamond anvil cell (DAC). |
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Keywords: | Corresponding author. Diamond anvil cell High pressure High temperature Phase transition Magnetic permeability Nickel |
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