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

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

doi:10.1080/08957959.2014.977277

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

Journal Article · Fri Nov 07 00:00:00 EST 2014 · High Pressure Research

DOI:https://doi.org/10.1080/08957959.2014.977277· OSTI ID:1251168

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)

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 → Sm-type → 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 GPa and a temperature of 10 K. The magnetic ordering temperature has been determined from the four-point electrical resistivity measurements carried out on gadolinium. Lastly, 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.

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Research Organization:: Univ. of Alabama, Birmingham, AL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

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

Grant/Contract Number:: NA0002014; AC52-07NA27344

OSTI ID:: 1251168

Alternate ID(s):: OSTI ID: 1342022

Report Number(s):: LLNL-JRNL-695620

Journal Information:: High Pressure Research, Vol. 34, Issue 4; ISSN 0895-7959

Publisher:: Taylor & FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 14 works

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Zero-Kelvin Compression Isotherms of the Elements 1 ≤ Z ≤ 92 to 100 GPa Young, David A.; Cynn, Hyunchae; Söderlind, Per Journal of Physical and Chemical Reference Data, Vol. 45, Issue 4 https://doi.org/10.1063/1.4963086	journal	December 2016
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Fabrication of Diamond Based Sensors for Use in Extreme Environments Samudrala, Gopi; Moore, Samuel; Vohra, Yogesh Materials, Vol. 8, Issue 5 https://doi.org/10.3390/ma8052054	journal	April 2015

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