TY - JOUR
T1 - Sub-boundaries in3He and4He single crystal and their migration below 1K observed by X-ray topography
AU - Nakajima, Tetsuo
AU - Ohta, Joji
AU - Yonenaga, Ichiro
AU - Koizumi, Hirokazu
AU - Iwasa, Izumi
AU - Suzuki, Haruhiko
AU - Suzuki, Takayoshi
AU - Suzuki, Hideji
PY - 1995/11/1
Y1 - 1995/11/1
N2 - The observation of alterations in crystal structure at ultra-low temperatures by X-ray diffraction, made possible by the realization of synchrotron radiation use after a quarter of this century, plays an important role in obtaining an understanding of the base structure of solids. For that, two types of3He-4He dilution refrigerators with a modified version of the top-loading facilities were installed at the BL-3C2 and 6C1 stations of the Photon Factory. In BL-3C2, the behaviors of lattice defects in solid helium have been studied by X-ray topography. In this note, the migrations of sub-boundaries in3He and4He single-crystals are reported as being the result of an annealing effect. After annealing hcp4He single crystals for 80min at 0.5K, no change in crystallographic orientations could be easily observed from white SR X-ray topographs. In the same type topographs of bcc3He single crystals after annealing for several hours at 03K, migration of sub-boundaries were conspicuously discerned.
AB - The observation of alterations in crystal structure at ultra-low temperatures by X-ray diffraction, made possible by the realization of synchrotron radiation use after a quarter of this century, plays an important role in obtaining an understanding of the base structure of solids. For that, two types of3He-4He dilution refrigerators with a modified version of the top-loading facilities were installed at the BL-3C2 and 6C1 stations of the Photon Factory. In BL-3C2, the behaviors of lattice defects in solid helium have been studied by X-ray topography. In this note, the migrations of sub-boundaries in3He and4He single-crystals are reported as being the result of an annealing effect. After annealing hcp4He single crystals for 80min at 0.5K, no change in crystallographic orientations could be easily observed from white SR X-ray topographs. In the same type topographs of bcc3He single crystals after annealing for several hours at 03K, migration of sub-boundaries were conspicuously discerned.
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U2 - 10.1007/BF00753377
DO - 10.1007/BF00753377
M3 - Article
AN - SCOPUS:2142861152
VL - 101
SP - 701
EP - 706
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
SN - 0022-2291
IS - 3-4
ER -