Elastic, Magnetic, and Electronic Properties of Iridium Phosphide Ir2P
Cubic (space group: Fmm) iridium phosphide, Ir2P, has been synthesized at high pressure and high temperature. Angle-dispersive synchrotron X-ray diffraction measurements on Ir2P powder using a diamond-anvil cell at room temperature and high pressures (up to 40.6 GPa) yielded a bulk modulus of B[subscript 0] = 306(6) GPa and its pressure derivative B0′ = 6.4(5). Such a high bulk modulus attributed to the short and strongly covalent Ir-P bonds as revealed by first – principles calculations and three-dimensionally distributed [IrP4] tetrahedron network. Indentation testing on a well–sintered polycrystalline sample yielded the hardness of 11.8(4) GPa. Relatively low shear modulus of ~64 GPa from theoretical calculations suggests a complicated overall bonding in Ir2P with metallic, ionic, and covalent characteristics. In addition, a spin glass behavior is indicated by magnetic susceptibility measurements.
- Author (aut): Wang, Pei
- Author (aut): Wang, Yonggang
- Author (aut): Wang, Liping
- Author (aut): Zhang, Xinyu
- Author (aut): Yu, Xiaohui
- Author (aut): Zhu, Jinlong
- Author (aut): Wang, Shanmin
- Author (aut): Qin, Jiaqian
- Author (aut): Leinenweber, Kurt
- Author (aut): Chen, Haihua
- Author (aut): He, Duanwei
- Author (aut): Zhao, Yusheng
- Contributor (ctb): Department of Chemistry and Biochemistry