Thermal diffusivity measurements of natural and isotopically enriched diamond by picosecond infrared transient grating experiments |
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Authors: | A Tokmakoff W F Banholzer M D Fayer |
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Institution: | (1) Low Temperature Physics Group, Centre for Advanced Technology, 452 013 Indore, India |
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Abstract: | The photopyroelectric (PPE) technique is used to measure the specific heat of YBa2Cu3O7–X
thin films. Hysteresis in the PPE amplitude is observed in the temperature range 90 K to 250 K. Peaks in the inverse PPE amplitude at T=110 K in the cooling path and at T230 K in the heating path are observed. The magnitude of hysteresis depends upon the thermal history of the sample. |
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Keywords: | 78 20 Hp 74 30 Ek |
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