Abstract
We use polarized neutron scattering to characterize the Bragg scattering intensity below TC=89.5 K at the (1,0,0) pseudocubic nuclear Bragg point of LaCoO3. Upon cooling in a field (FC), a net magnetic moment is apparent in Bragg scattering intensity, just as it was in previous magnetization measurements. Critical behavior associated with the net moment near TC upon cooling in small applied fields rapidly rounds with increasing field strength. We show, using a mean-field calculation, that this net moment can develop in a metastable state that forms upon FC, even when all the interactions in the system are antiferromagnetic.
| Original language | English |
|---|---|
| Article number | 024418 |
| Journal | Physical Review B |
| Volume | 97 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 19 2018 |
Funding
The authors thank Alice Durand, Brendan Wells, and Frank Bridges for helpful discussions. We also thank Qing Huang and Haidong Zhou for their efforts in growing crystals for the experiments. The calculations were done on the UCSC Hyades (NSF award AST-1229745) and Hummingbird computational clusters. Research at ORNL's HFIR was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. J.-Q.Y. was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division.