Abstract
The observation of changes in the crystal structure at low temperatures plays very important roles in gaining a better understanding of mechanism of the phase transformation and stability of the phase as a ground state. For these purposes, two sets of 3He‐4He dilution refrigerators with a top loading facility were installed at BL‐3C2 and 6C1 of the Photon Factory. The former is used exclusively for taking topographs from quantum crystals of solid 3He and 4He for studies of lattice defects. Typical examples of topographs, which indicate an annealing effect of solid helium which might be understood from a viewpoint of a quantum tunneling effect, are presented. The latter refrigerator is used for studies of crystalline solids by x‐ray diffraction. A splitting of the Laue spots of Cs2NaHoCl6 below 150 mK, giving evidence of a Jahn–Teller transition of the first kind, which is the lowest transition temperature ever detected, was observed as a new peculiarity of the phase transition at ultralow temperature.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
