Neutron diffraction study of magnetic ordering in high pressure phases of rare earth metal holmium

Perreault, Christopher S.; Vohra, Yogesh K.; dos Santos, Antonio M.; Molaison, Jamie J.

doi:10.1016/j.jmmm.2020.166843

Neutron diffraction study of magnetic ordering in high pressure phases of rare earth metal holmium

Journal Article · Sun Mar 29 00:00:00 EDT 2020 · Journal of Magnetism and Magnetic Materials

DOI:https://doi.org/10.1016/j.jmmm.2020.166843· OSTI ID:1607351

Perreault, Christopher S. ^[1]; Vohra, Yogesh K. ^[2]; ^[3]; ^[3]

Univ. of Alabama, Birmingham, AL (United States); University of Alabama at Birmingham
Univ. of Alabama, Birmingham, AL (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

The magnetic ordering in rare earth metals is well established for ambient pressure crystal structures, however, little is known about the magnetic ordering in their corresponding high-pressure crystalline modifications. Holmium (Ho) was studied in a large-volume diamond anvil cell at the Spallation Neutron Source to high-pressure up to 20 GPa and to low-temperature to 10 K. We have conducted two independent high-pressure low-temperature experiments under non-hydrostatic and quasi-hydrostatic pressure conditions respectively. The ambient pressure hexagonal close packed (hcp) phase of holmium shows two magnetic transitions below 10 GPa one to an incommensurate Antiferromagnetic (AFM) phase and another to a conical-Ferromagnetic (c-FM) phase. In contrast, alpha-Samarium-type (α-Sm) phase above 10 GPa and the double hexagonal close packed (dhcp) phase above 19 GPa show only one FM transition marked by the appearance of a magnetic peak at 3 Å and the concurrent enhancement of nuclear peaks below 30 K. Finally, these new transitions observed by neutron diffraction can be accounted by a commensurate superlattice formation along c-axis in both the α-Sm-type phase and the dhcp phase.

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Alabama, Birmingham, AL (United States)

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

Grant/Contract Number:: AC02-06CH11357; AC05-00OR22725; NA0003916

OSTI ID:: 1607351

Alternate ID(s):: OSTI ID: 1608146
OSTI ID: 1828268

Journal Information:: Journal of Magnetism and Magnetic Materials, Journal Name: Journal of Magnetism and Magnetic Materials Journal Issue: C Vol. 507; ISSN 0304-8853

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
high pressure
magnetic transitions
neutron diffraction
rare earth metals

Neutron diffraction study of magnetic ordering in high pressure phases of rare earth metal holmium

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References (13)

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