Temperature Modulation Measurements of the Thermal Properties of Nanosystems at Low Temperatures |
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Authors: | Jean-Savin Heron Germain M Souche Florian R Ong Philippe Gandit Thierry Fournier Olivier Bourgeois |
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Affiliation: | 1. Institut NéEL, 25 rue des Martyrs, BP 166, 38042, Grenoble Cedex 9, France
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Abstract: | We report on the dynamic measurements of thermal properties of nanosystems at very low temperatures. These techniques are based on the modulation of the temperature and hence leads to highly sensitive measurements. We will discuss the intrinsic limitations of these methods when the thermal properties of nano-objects are studied at very low temperatures, much below 1 K. Firstly, we will present thermal conductance measurements using the 3ω method. This technique is limited at low temperatures due to the significant increase of the mean free path. Secondly, heat capacity measurements using ac calorimetry are outlined, and again restrictions occur due to the continuous temperature gradient inherent to that technique. Propositions are made in order to overcome these limitations. |
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