The Order Parameter for the Incommensurate Transition in K_2Seo_4:an EPR Lineshape Study

概要

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The EPR lineshape of the Se0j center was investigated in the normal-incommensurate transition of K.SeO.. The value /7=0.33f0.03 was obtainedfor the critical exponent of the order parameter. A summary of the measuredvalues of the critical exponent p found in the literature for structurally incom-mensurate systems is presented. The average value of those measurements,/7=0.345.5,0.004, is in excellent agreement with the calculated value of fi forthe 3d XY model. The lineshape analysis seems also to indicate that phase solitonsappear in a large region of the incommensurate phase.
社団法人日本物理学会の論文
1984-07-15