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Title: Magnetic structure and magnetocalorics of GdPO 4

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [2];  [1];  [3];  [1];  [4];  [5];  [6]
  1. CSIC - Univ. of Zaragoza, Zaragoza (Spain)
  2. CSIC - Univ. of Zaragoza, Zaragoza (Spain); Institut Laue-Langevin (ILL), Grenoble (France)
  3. Institut Laue-Langevin (ILL), Grenoble (France); Australian Nuclear Science and Technology Organization, Lucas Heights, NSW (Australia)
  4. Rutherford Appleton Lab., Didcot (United Kingdom); Delft Univ. of Technology, Delft (The Netherlands)
  5. Leiden Univ., Leiden (The Netherlands)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

The magnetic ordering structure of GdPO4 is determined at T = 60 mK by diffraction of hot neutrons with wavelength = 0.4696 Å. It corresponds to a non-collinear antiferromagnetic arrangement of the Gd moments with propagation vector k = (1/2, 0, 1/2). This arrangement is found to minimize the dipole-dipole interaction and the crystal field anisotropy energy, the magnetic superexchange being much smaller. The intensity of the magnetic reflections decreases with increasing temperature and vanishes at T ≈ 0.8 K, in agreement with the magnetic ordering temperature TN = 0.77 K, as reported in previous works based on heat capacity and magnetic susceptibility measurements. The magnetocaloric parameters have been determined from heat capacity data at constant applied fields up to 7 T, as well as from isothermal magnetization data. Lastly, the magnetocaloric effect, for a field change ΔB = 0 – 7T, reaches –ΔST = 375.8mJ / cm3K–1 at T = 2.1 K, largely exceeding the maximum values reported to date for Gd-based magnetic refrigerants.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1286793
Alternate ID(s):
OSTI ID: 1180469
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 90, Issue 21; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 87 works
Citation information provided by
Web of Science

References (22)

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Cited By (13)

Enhanced Magnetocaloric Effect from Cr Substitution in Ising Lanthanide Gallium Garnets Ln 3 CrGa 4 O 12 ( Ln = Tb, Dy, Ho) journal July 2017
High-Performance Magnetic Refrigerant Featuring One-Dimensional Gd-O Chains and O-Gd 3 Triangles journal September 2018
K 3 Li 3 Gd 7 (BO 3 ) 9 : A New Gadolinium-Rich Orthoborate for Cryogenic Magnetic Cooling journal February 2018
Layered gadolinium hydroxides for low-temperature magnetic cooling journal January 2015
High-performance low-temperature magnetic refrigerants made of gadolinium-hydroxy-chloride journal January 2016
A novel alb metalloring organic framework with a {Ni 12 Gd 24 } cage exhibiting a significant magnetocaloric effect journal January 2017
Magnetorefrigeration capability of a gadolinium( iii ) coordination polymer containing trimesic acid: a correlation between the isothermal magnetic entropy change and the gadolinium content journal January 2017
An excellent cryogenic magnetic cooler: magnetic and magnetocaloric study of an inorganic frame material journal January 2018
A large magnetocaloric effect in two hybrid Gd-complexes: the synergy of inorganic and organic ligands towards excellent cryo-magnetic coolants journal January 2019
Ferromagnetic Ising chains in frustrated LnODCO 3 : the influence of magnetic structure in magnetocaloric frameworks journal January 2019
Magnetic and cryogenic magnetocaloric properties of NaGdF 4 nanocrystals journal October 2019
Large low-field magnetic refrigeration in ferromagnetic insulator EuTi 0.9 V 0.1 O 3 journal June 2018
Features of the Low-Temperature Heat Capacity of Er3 –xTmxAl5O12 Garnet Single Crystals journal August 2019

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