Abstract
Cubic spinel GeNi2O4 exhibits intriguing magnetic properties with two successive antiferromagnetic phase transitions (TN1≈12.1 and TN2≈11.4K) with the absence of any structural transition. We have performed detailed heat-capacity and magnetic measurements in different crystallographic orientations. A magnetic phase in the presence of the magnetic field (H≥4T) along the [111] direction is revealed, which is not observed when the magnetic field is applied along the [100] and [110] directions. High-field neutron powder-diffraction measurements confirm such a change in the magnetic phase, which could be ascribed to a spin reorientation in the presence of the magnetic field. A strong magnetic anisotropy and competing magnetic interactions play a crucial role in the complex magnetic behavior in this cubic system.
| Original language | English |
|---|---|
| Article number | 134421 |
| Journal | Physical Review B |
| Volume | 102 |
| Issue number | 13 |
| DOIs | |
| State | Published - Oct 15 2020 |
Funding
T.B. and X.K. acknowledge the financial support by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Award No. DE-SC0019259. T.Z. was supported by the start-up funds at Michigan State University. Z.D. and H.Z. acknowledge the financial support from U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Award No. DE-SC0020254. A portion of this research used resources at the High Flux Isotope Reactor, a DOE Office of Science user facility operated by the Oak Ridge National Laboratory.