Measurements of the Vibronic Properties of KTaO_3 and SrTiO_3 in Intense Magnetic Fields at Low Temperatures

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概要

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• The changes in the dielectric constant (e) of a single crystal of KTaO, and of aceramic plate of SrTi0, were measured at 4.2 and 20.4 K in magnetic fields up to 15 Tto examine recent vibronic-theory predictions. It is found that these changes areorders of magnitude smaller than predicted and are of opposite sign in KTaO. andSrTi0.. Measurements on KTaO. at 20.4 K were made with the magnetic field alignedalong the [111], [110], and [1004 directions and with an electric field (4.5kV/cm)along [0013 in the latter case, and these data are analyzed for the magnetoelectric tensor coefficients. It is found that the largest vibronic change is along [0014, and themagnetic field splits and hardens the soft-mode frequency in KTa0., the paralleleffect being about twice as large as the perpendicular effect.

• 社団法人日本物理学会の論文
• 1985-11-15

著者

• Lawless W.N.

  Ceramphysics Inc.

• Lawless W

  Ceramphysics Inc.

• Swartz S

  Materials Research Laboratory Pennsylvania State University

• Clark C.F.

  CeramPhysics,Inc.

• Swartz S.L.

  Materials Research Laboratory,Pennsylvania State University

関連論文

• 29p-W-10 非晶質及び結晶PbTiO_3の低温における誘電率
• The Structural, Dielectric, Raman-Spectral and Low-Temperature Properties of Amorphos PbTiO_3
• Measurements of the Vibronic Properties of KTaO_3 and SrTiO_3 in Intense Magnetic Fields at Low Temperatures
• 29p-W-9 非晶質及び結晶PbTiO_3の低温における比熱
• Specific Heat of Amorphous and Crystalline PbTiO_3 at Low Temperatures

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