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Missing magnetism in Sr4Ru3O10: Indication for Antisymmetric Exchange Interaction

Journal Article · · Scientific Reports
 [1];  [2];  [2];  [2];  [3];  [4];  [4];  [5];  [5];  [5]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Univ. of Texas, Dallas, TX (United States). Dept. of Physics
  4. Univ. of Johannesburg (South Africa). Dept. of Physics
  5. Univ. of Salerno, Fisciano (Italy). CNR-SPIN Inst. Sede Secondaria di Salerno
Metamagnetism occuring inside a ferromagnetic phase is peculiar. Therefore, Sr4Ru3O10, a T C = 105 K ferromagnet, has attracted much attention in recent years, because it develops a pronounced metamagnetic anomaly below T C for magnetic fields applied in the crystallographic ab-plane. The metamagnetic transition moves to higher fields for lower temperatures and splits into a double anomaly at critical fields Hc1 = 2.3 T and Hc2 = 2.8 T, respectively. Here, we report a detailed study of the different components of the magnetization vector as a function of temperature, applied magnetic field, and varying angle in Sr4Ru3O10. We discover for the first time a reduction of the magnetic moment in the plane of rotation at the metamagnetic transition. The anomaly shifts to higher fields by rotating the field from H ⊥ c to H || c. We compare our experimental findings with numerical simulations based on spin reorientation models taking into account magnetocrystalline anisotropy, Zeeman effect and antisymmetric exchange interactions. While Magnetocrystalline anisotropy combined with a Zeeman term are sufficient to explain a metamagnetic transition in Sr4Ru3O10, a Dzyaloshinskii-Moriya term is crucial to account for the reduction of the magnetic moment as observed in the experiments.
Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
National Research Foundation (NRF) (South Africa); National Science Foundation (NSF) (United States); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Contributing Organization:
Florida State Univ., Tallahassee, FL (United States); Univ. of Salerno, Fisciano (Italy); Univ. of Texas, Dallas, TX (United States)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1369197
Report Number(s):
LA-UR-17-20729
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Vol. 7; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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