Thermal effects in the anomalous growth of helium crystals
- Russian Research Centre Kurchatov Institute, Institute of Superconductivity and Solid State Physics (Russian Federation), E-mail: VLT@isssph.kiae.ru
Variations in pressure and thermal response have been synchronously measured beginning from the moment of nucleation of a helium crystal, at the onset of anomalously fast growth and during this growth, and in the course of relaxation to the normal kinetics. The measurements were performed at temperatures within 0.4-0.7 K in a range of pressures from the boundary of the anomalous growth region up to an overpressure of {delta}P {approx} 25 mbar. A superconductor bolometer with an rms noise of about 10 {mu}K was used as the fast-response thermal sensor. Temperature variations related to changes in the pressure and the heat dissipation during crystal growth were observed. The upper boundary of possible variations in the internal energy of the crystal is estimated as 1-20% of the excess energy of the system prior to the onset of anomalous growth.
- OSTI ID:
- 21067590
- Journal Information:
- Journal of Experimental and Theoretical Physics, Vol. 103, Issue 6; Other Information: DOI: 10.1134/S1063776106120041; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
Similar Records
Determination of the optical properties of La2-xBaxCuO₄ for several dopings, including the anomalous x=1/8 phase
Magnetic and structural properties of BiFeO{sub 3} thin films grown epitaxially on SrTiO{sub 3}/Si substrates