Phys. Rev. B 75, 064109 (2007) - High-pressure structural studies of dysprosium using angle-dispersive x-ray diffraction

High-pressure structural studies of dysprosium using angle-dispersive x-ray diffraction

Yong Rong Shen, Ravhi S. Kumar, Andrew L. Cornelius, and Malcolm F. Nicol

Phys. Rev. B 75, 064109 – Published 28 February 2007

Abstract

We present structural results under pressure for elemental dysprosium (Dy) up to $87 GPa$ using in situ angle-dispersive x-ray diffraction measurements with synchrotron x rays and a diamond-anvil cell. Dy exhibits the structural transition sequence, $hP 2 \to hR 9 \to hP 4 \to distorted$ cF4, from Rietveld full-profile refinements. Clear evidence is documented for the high-pressure distorted cF4 phase observed above $45 GPa$ to be an orthorhombic oS8 $(C m m m)$ structure for Dy in the lanthanide phase diagram.

Received 28 April 2006

DOI:https://doi.org/10.1103/PhysRevB.75.064109

©2007 American Physical Society

Authors & Affiliations

Yong Rong Shen^*, Ravhi S. Kumar^†, Andrew L. Cornelius, and Malcolm F. Nicol

Department of Physics and High Pressure Science and Engineering Center, University of Nevada Las Vegas, Las Vegas, Nevada 89154-4002, USA

^*Deceased.
^†Electronic address: ravhi@physics.unlv.edu

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Issue

Vol. 75, Iss. 6 — 1 February 2007

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