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Title: Elastic, magnetic and electronic properties of iridium phosphide Ir 2P

Cubic (space group: Fm3¯m) iridium phosphide, Ir 2P, has been synthesized at high pressure and high temperature. Angle-dispersive synchrotron X-ray diffraction measurements on Ir 2P powder using a diamond-anvil cell at room temperature and high pressures (up to 40.6 GPa) yielded a bulk modulus of B 0 = 306(6) GPa and its pressure derivative B 0'= 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 [IrP 4] 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 Ir 2P with metallic, ionic, and covalent characteristics. Additionally, a spin glass behavior is indicated by magnetic susceptibility measurements.
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [2] ;  [2] ;  [5] ;  [6] ;  [7] ;  [8] ;  [2]
  1. Sichuan Univ., Chengdu (People's Republic of China); Univ. of Nevada, Las Vegas, NV (United States)
  2. Univ. of Nevada, Las Vegas, NV (United States)
  3. Yanshan Univ., Qinhuangdao (People's Republic of China)
  4. Chinese Academy of Sciences, Beijing (People's Republic of China)
  5. Chulalongkorn Univ., Bangkok (Thailand)
  6. Arizona State Univ., Tempe, AZ (United States)
  7. Qinghai Univ., Xining (People's Republic of China)
  8. Sichuan Univ., Chengdu (People's Republic of China)
Publication Date:
Grant/Contract Number:
AC02-06CH11357; NA0001982
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 02; Journal ID: ISSN 2045-2322
Nature Publishing Group
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Nevada, Reno, NV (United States); Univ. of Nevada, Las Vegas, NV (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; condensed-matter physics; electronic properties and materials; 36 MATERIALS SCIENCE; high-pressure synthesis; hard materials; bulk modulus; Vickers hardness; Iridium phosphide
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1252989; OSTI ID: 1332527