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19 April 2024 |
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AC-Calorimetry at High Pressure and Low Temperature | | Heribert Wilhelm
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21 Mar 2003 | | Journal: | Adv. Solid State Phys., Vol. 43, ed. by B. Kramer, Springer-Verlag Berlin Heidelberg, pp.889-901 (2003) | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | Recent developments of the AC-calorimetric technique adapted for the needs of high pressure experiments are discussed. A semi-quantitative measurement of the specific heat with a Bridgman-type of pressure cell as well as a diamond anvil cell is possible in the temperature range 0.1 K < T < 10 K. The pressure transmitting medium used to ensure good pressure conditions determines to a great extent via its thermal conductivity the operating frequency and thus the accessible temperature range. Investigations with different pressure transmitting media for T > 1.5 K reveal for solid He a cut-off frequency which is considerably higher than for steatite. Experiments below 1 K and pressures above 10 GPa clearly show that the pressure dependence of the linear temperature coefficient of the specific heat can be measured. It is in qualitative agreement to a related quantity obtained quasi-simultaneously by electrical resistivity measurements on the same sample. | | Source: | arXiv, cond-mat/0303457 | | Services: | Forum | Review | PDF | Favorites | |
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