EXPERIMENTAL DETERMINATION OF ACOUSTIC PHONONS IN LiTaO_3

GOU CHENG;NIU SHIWEN;LIN HONG;MENG XIANLIN;XU BINGCHAO China Institute of Atomic Energy, P.O.Box 275, Beijing Institute of Crystal Materials. Shandong Univ., Jinan

doi:10.7538/yzk.1990.24.02.0085

GOU CHENG;NIU SHIWEN;LIN HONG;MENG XIANLIN;XU BINGCHAO China Institute of Atomic Energy, P.O.Box 275, Beijing Institute of Crystal Materials. Shandong Univ., Jinan. EXPERIMENTAL DETERMINATION OF ACOUSTIC PHONONS IN LiTaO_3[J]. Atomic Energy Science and Technology, 1990, 24(2): 85-85. DOI: 10.7538/yzk.1990.24.02.0085

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EXPERIMENTAL DETERMINATION OF ACOUSTIC PHONONS IN LiTaO_3

GOU CHENG;NIU SHIWEN;LIN HONG;MENG XIANLIN;XU BINGCHAO China Institute of Atomic Energy, P.O.Box 275, Beijing Institute of Crystal Materials. Shandong Univ., Jinan

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The acoustic phonon dispersion curves of the lithium tantalate crystal aremeasured in the two principal symmetry direction 00ξ and 0ξ0 by coherentinelastic neutron scattering. The sound velocities in the crystal are deduced fromthe slope of these branches at low q.

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EXPERIMENTAL DETERMINATION OF ACOUSTIC PHONONS IN LiTaO_3

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