Bradley, Ian and Fisher, Shaun and Guénault, A.M. and Haley, Richard and Mulders, N. and Pickett, George and Potts, David and Skyba, Peter and Smith, James and Tsepelin, Viktor and Whitehead, R. C. V. (2010) Magnetic phase transition in a nanonetwork of solid (3)He in aerogel. Physical review letters, 105 (12): 125303. ISSN 1079-7114
Abstract
When immersed in liquid (3)He, the nanometer strands of aerogel are coated with a thin layer of solid (3)He, forming a network of irregular nanotubes. Owing to its high purity and weak interactions, this system is ideal for studying fundamental processes. We report the first experiments on solid 3He in aerogel at ultralow temperatures, cooled by direct adiabatic demagnetization. Simultaneous nuclear magnetic susceptibility and heat capacity measurements indicate a magnetic phase transition.