Electron Paramagnetic Resonance Investigation of the Ferroelectric Transition in N_2H_5Al (SO_4)_2・12H_2O Crystals

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概要

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• The EPR spectra exhi bited by the doped Cr" tons is sensitive to the reported low-temperatttreferroelectric transition in N2H5Al(804)2?12H2O crystals. Strtmcttural informations that can bededtrced from the experirnental results include: (1) the appearance of merohedral twinningis concurrent with the onset of the structural phase transition; (2) the crystalline three['o1dsymmetry, which is lost with the onset of the structural phase transition, becotnes the twinlaw relating the orientations of' the counponent domains; (3) the crystal symmetry below thetransition tenuperattmre is orthorhombic; (4) the crystalline cttbic axes of the high-teraaperature,cubic phase becorne the three crystalline twofold axes of the low-tetnperature, orthorhotnbicphase; and (5) a single Cr" species is detected in both the ctrbic and the orthorhombic phases,which implies that all the Al" sites are crystallographically eqtmivalent in both phases.

• 社団法人日本物理学会の論文
• 1997-06-15

著者

• Wu C‐j

  Department Of Mathmatics And Science Education National Haulien Teachers College

• Yu Jiang-tsu

  Department Of Physics National Taiwan Normal University

• WU Ching-Jiun

  Department of Mathmatics and Science Education,National Haulien Teachers College

関連論文

• Electron Paramagnetic Resonance Investigation of the Ferroelectric Transition in N_2H_5Al (SO_4)_2・12H_2O Crystals

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