Exploring the behavior of molybdenum diboride (MoB2): A high pressure x-ray diffraction study

Exploring the behavior of molybdenum diboride (MoB2): A high pressure x-ray diffraction study

Investigation of the equation of state of molybdenum diboride (MoB2) 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 th...

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Veröffentlicht in:Journal of applied physics 2014-04, Vol.115 (16)
Hauptverfasser: Liu, Pingping, Peng, Fang, Yin, Shuai, Liu, Fangming, Wang, Qiming, Zhu, Xuhui, Wang, Pei, Liu, Jing, He, Duanwei
Format: Artikel
Sprache:eng
Schlagworte:
ANISOTROPY
Applied physics
Axes (reference lines)
Bulk modulus
COMPARATIVE EVALUATIONS
COMPRESSIBILITY
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Crystals
Diamond anvil cells
Diamonds
EQUATIONS OF STATE
First principles
IMPACT STRENGTH
Molybdenum
MOLYBDENUM BORIDES
PRESSURE DEPENDENCE
SYNCHROTRON RADIATION
TEMPERATURE RANGE 0273-0400 K
TRIGONAL LATTICES
Unit cell
X ray powder diffraction
X-RAY DIFFRACTION
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Zusammenfassung:Investigation of the equation of state of molybdenum diboride (MoB2) 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 MoB2 is stable up to 24.1 GPa. The ADXRD data yield a bulk modulus K0 = 314(11) GPa with a pressure derivative K0′ = 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 MoB2 demonstrates an anisotropic property with pressure increasing.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4872459