Long-period stacking structures in yttrium trihydride at high pressure

被引：35

作者：

Machida, A.

Ohmura, A.

Watanuki, T.

Aoki, K.

Takemura, K.

机构：

[1] Japan Atom Energy Agcy, Synchrotron Radiat Res Ctr, Sayo, Hyogo 6795148, Japan

[2] Natl Inst Mat Sci, Adv Nano Mat Lab, Tsuchiura, Ibaraki 3050044, Japan

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 05期

关键词：

HYDROSTATIC-PRESSURE; PHASE-TRANSITION; DIFFRACTION; FILMS; YD3;

D O I：

10.1103/PhysRevB.76.052101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The pressure-induced structural transition of YH3 has been investigated by x-ray diffraction experiments under hydrostatic pressure at room temperature. The diffraction patterns of the intermediate state between the hexagonal and cubic phases are interpreted in terms of long-period polytypes with the periodic arrangements of hexagonal-type and fcc-type stacking layers of the Y metals. The hydrogen-hydrogen repulsive interactions and hydrogen-metal bonding likely play a dominant role in the gradual hexagonal-fcc lattice conversion via the long-period polytypic structures.

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页数：4

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