Calculation of the Third- and Fourth-Order Elastic Constans of Alkali Halide Crystals
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概要
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The evluation of six third-order and eleven fourth-order elastic constants of analkali halide crystal has been made by calculating higher o?-der strain derivativesof the crystal free energy. The energy adopted was: the sum o'f the long-range Cou-Tomb and the short-range Born-Mayer potentials and the vibrational free energyof the lattice. The evaluation of the higher order elastic constants has been donefor Lid, Nail, and KCI at 0 K and 300 K, and the results were in reasonableagreement with conclusions of other experimental and theoretical studies. Thethird-order and the fourth-order elastic constants largest in absolute values wererespectively negative and positive in their signs, and one artd two orders largerin their magnitudes than the second-order elastic constants.
- 社団法人日本物理学会の論文
- 1978-11-15
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