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Journal Articles

Coupled THMC analysis for predicting hydro-mechanical evolution in siliceous mudstone

Ogata, Sho*; Yasuhara, Hideaki*; Aoyagi, Kazuhei; Kishida, Kiyoshi*

Proceedings of 53rd US Rock Mechanics/Geomechanics Symposium (USB Flash Drive), 6 Pages, 2019/06

Journal Articles

High-pressure induced structural changes in metastable Ge$$_{2}$$Sb$$_{2}$$Te$$_{5}$$ thin films; An X-ray absorption study

Fons, P.*; Kolobov, A.*; Tominaga, Junji*; Katayama, Yoshinori

Nuclear Instruments and Methods in Physics Research B, 238(1-4), p.160 - 162, 2005/08

 Times Cited Count:5 Percentile:55.51(Instruments & Instrumentation)

Super-resolution (SR) media offer up to a factor of ten increase in areal storage density over conventional DVD media. Although SR has been realized, there is a strong need for a deeper understanding of structural and electronic changes in Ge$$_{2}$$Sb$$_{2}$$Te$$_{5}$$ (GST), a principal optical memory component, with external perturbations. Recording of SR disks leads to the formation of gas-phase bubbles that in turn lead to the development of large stresses on the underlying GST layer. In this paper we report on XAFS of nominally hydrostatic (0-10 GPa) compressive stress-induced structural changes of the metastable crystalline phase of GST. An analysis showed that the initial splitting of Ge Te bond lengths of the room-temperature distorted rocksalt structure decreased to a small but finite splitting for $$p$$ $$_sim^{>}$$ 6 GPa. The implications of this upon the proposed ferroelectric catastrophe super-RENS readout mechanism are discussed.

Journal Articles

Thermodynamic properties of Th$$_{0}$$$$_{.}$$$$_{8}$$$$_{0}$$U$$_{0}$$$$_{.}$$$$_{2}$$$$_{0}$$O$$_{2}$$$$_{+}$$$$_{x}$$ solid solution

; ; Shiba, Koreyuki

J.Nucl.Mater., 116(2-3), p.172 - 177, 1983/00

 Times Cited Count:14 Percentile:18.74

no abstracts in English

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