Magnetic ordering temperatures in rare earth metal dysprosium under ultrahigh pressures

Samudrala, Gopi K.; Tsoi, Georgiy M.; Weir, Samuel T.; Vohra, Yogesh K.

doi:10.1080/08957959.2014.903946

Title: Magnetic ordering temperatures in rare earth metal dysprosium under ultrahigh pressures

Journal Article · Thu Apr 03 00:00:00 EDT 2014 · High Pressure Research

DOI:https://doi.org/10.1080/08957959.2014.903946· OSTI ID:1251163

Samudrala, Gopi K. ^[1]; Tsoi, Georgiy M. ^[1]; Weir, Samuel T. ^[2]; Vohra, Yogesh K. ^[1]

Univ. of Alabama at Birmingham, Birmingham, AL (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Magnetic ordering temperatures in heavy rare earth metal Dysprosium (Dy) have been studied using an ultrasensitive electrical transport measurement technique in a designer diamond anvil cell to extreme conditions of pressure to 69 GPa and temperature to 10 K. Previous studies using magnetic susceptibility measurements at high pressures were only able to track magnetic ordering temperature till 7 GPa in the hexagonal close packed (hcp) phase of Dy. Our studies indicate that the magnetic ordering temperature shows an abrupt drop of 80 K at the hcp-Sm phase transition followed by a gradual decrease that continues till 17 GPa. This is followed by a rapid increase in the magnetic ordering temperatures in the double hexagonal close packed phase and finally leveling off in the distorted face centered cubic phase of Dy. Lastly, our studies reaffirm that 4f-shell remain localized in Dy and there is no loss of magnetic moment or 4f-shell delocalization for pressures up to 69 GPa.

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Research Organization:: Univ. of Alabama, Birmingham, AL (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0002014

OSTI ID:: 1251163

Journal Information:: High Pressure Research, Vol. 34, Issue 2; ISSN 0895-7959

Publisher:: Taylor & FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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