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Title: Structural and magnetic phase transitions in gadolinium under high pressures and low temperatures

High pressure structural transition studies have been carried out on rare earth metal gadolinium in a diamond anvil cell at room temperature to 169 GPa. Gadolinium has been compressed to 38% of its initial volume at this pressure. With increasing pressure, a crystal structure sequence of hcp → Smtype→ dhcp → fcc → dfcc → monoclinic has been observed in our studies on gadolinium. The measured equation of state of gadolinium is presented to 169 GPa at ambient temperature. Magnetic ordering temperature of gadolinium has been studied using designer diamond anvils to a pressure of 25 GP and a temperature of 10 K. The magnetic ordering temperature has been determined from the four-point electrical resistivity measurements carried out on gadolinium. Furthermore, our experiments show that the magnetic transition temperature decreases with increasing pressure to 19 GPa and then increases when gadolinium is subjected to higher pressures.
 [1] ;  [1] ;  [2] ;  [1]
  1. Univ. of Alabama at Birmingham, Birmingham, AL (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 0895-7959
Grant/Contract Number:
NA0002014; AC52-07NA27344
Accepted Manuscript
Journal Name:
High Pressure Research
Additional Journal Information:
Journal Volume: 34; Journal Issue: 4; Journal ID: ISSN 0895-7959
Taylor & Francis
Research Org:
Univ. of Alabama at Birmingham, Birmingham, AL (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
36 MATERIALS SCIENCE; high pressure structural transitions; magnetic ordering temperature; four-probe electrical measurements; designer diamond anvils; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1342022