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Impact of Erbium Doping in the Structural and Magnetic Properties of the Anisotropic and Frustrated SrYb2O4 Antiferromagnet

Journal Article · · Crystals
 [1];  [2];  [3];  [4];  [5];  [6];  [3];  [7];  [8];  [9]
  1. Stavanger University (Norway); Helmholtz Zentrum Berlin (Germany)
  2. Helmholtz Zentrum Berlin (Germany); Universidad Nacional de Colombia, Manizales
  3. Stavanger University (Norway)
  4. Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland); University of Birmingham (United Kingdom)
  5. Laboratory for Neutron Scattering, Villigen (Switzerland); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  6. Helmholtz Zentrum Berlin (Germany)
  7. Helmholtz Zentrum Berlin (Germany); Universidade Federal do Paraná, Curitiba (Brazil)
  8. Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Laboratory (RAL)
  9. Helmholtz Zentrum Berlin (Germany); Technical University of Denmark, Lyngby (Denmark); European Spallation Source, Lund (Sweden)
+ Show Author Affiliations
We present a systematic study of the structural and magnetic properties of a series of powder samples of SrYb2-xErxO4 with different Yb/Er concentrations. Magnetometry and neutron diffraction have been used to study the magnetic ground states of the compound series, while inelastic neutron scattering was used to investigate the crystal field excitations for a chosen concentration. These results show that the crystal structure remains the same for all compositions, while the lattice parameters increase linearly with the Er content. All compounds showed some type of magnetic transition below 1 K, however, both the magnetic structure and nature of the phase transition vary throughout the series. The samples present a non-collinear magnetic structure with the moments lying on the ab plane for low Er content. For high Er content, the magnetic structure is collinear with the moments aligned along the c-axis. A critical concentration is found where there is a bifurcation between zero-field and field-cooled magnetic susceptibility. This irreversible process could be due to the random mixture of single-ion magnetic anisotropies.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
Helmholtz Zentrum Berlin; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1963137
Journal Information:
Crystals, Journal Name: Crystals Journal Issue: 3 Vol. 13; ISSN 2073-4352
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
lanthanides
magnetic frustration
magnetic properties
single-ion anisotropy
solid-state reaction