Abstract
Magnetic structures of nanosized (20 to 70 nm) powders of MnWO4 and MnWO4:Mo were studied using neutron powder diffraction (NPD). Sizes and shapes of the crystallites calculated from anisotropic peak broadening of diffraction peaks were found to be orthogonal parallelepipedlike with the longest edge along the c axis and the shortest along the b axis. SQUID measurements indicate the presence of two magnetic transitions around 8 and 12 K. Rietveld refinement of the NPD data below the magnetic transition was consistent with the presence of an incommensurate spiral-like (ac-AF2) phase. A commensurate phase AF1 was not observed down to 2.5 K for all of the samples.
| Original language | English |
|---|---|
| Article number | 174427 |
| Journal | Physical Review B |
| Volume | 95 |
| Issue number | 17 |
| DOIs | |
| State | Published - May 18 2017 |
Funding
The work was supported by the Polish State Committee for Scientific Research (project register No. N N202 260939). We acknowledge the support of the National Institute of Standards and Technology, U. S. Department of Commerce, in providing the neutron research facilities used in this work and support for P.Z. under NIST Guest Researcher program. Certain commercial equipment, instruments, or materials (or suppliers, or software, etc.) are identified in this paper to foster understanding. Such identification does not imply recommendation or endorsement by the National Institute of Standards and Technology, nor does it imply that the materials or equipment identified are necessarily the best available for the purpose.
| Funders | Funder number |
|---|---|
| Polish State Committee for Scientific Research | N N202 260939 |
| National Institute of Standards and Technology | |
| U.S. Department of Commerce |