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Title: Exploring the behavior of molybdenum diboride (MoB{sub 2}): A high pressure x-ray diffraction study

Investigation of the equation of state of molybdenum diboride (MoB{sub 2}) has been performed to 24.1 GPa using synchrotron radiation angle-dispersive x-ray diffraction techniques (ADXRD) in a diamond anvil cell (DAC) at room temperature. Rietveld refinement of the X-ray powder diffraction data reveals that the rhombohedral structure MoB{sub 2} is stable up to 24.1 GPa. The ADXRD data yield a bulk modulus K{sub 0} = 314(11) GPa with a pressure derivative K{sub 0}{sup ′} = 6.4(1.5). The experimental data are discussed and compared to the results of first-principles calculations. In addition, the compressibility of the unit cell axes (a and c axes) of MoB{sub 2} demonstrates an anisotropic property with pressure increasing.
Authors:
; ; ; ; ; ; ;  [1] ;  [2]
  1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065 (China)
  2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)
Publication Date:
OSTI Identifier:
22273534
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 16; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; COMPARATIVE EVALUATIONS; COMPRESSIBILITY; EQUATIONS OF STATE; IMPACT STRENGTH; MOLYBDENUM BORIDES; PRESSURE DEPENDENCE; SYNCHROTRON RADIATION; TEMPERATURE RANGE 0273-0400 K; TRIGONAL LATTICES; X-RAY DIFFRACTION