Suppression of the commensurate magnetic phase in nanosized hübnerite
Journal Article
·
· Physical Review B
- Univ. of Silesia, Katowice (Poland). Inst. of Physics
- Polish Academy of Sciences (PAS), Warsaw (Poland). Inst. of Low Temperature and Structure Research
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
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. Finally, a commensurate phase AF1 was not observed down to 2.5 K for all of the samples.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE; National Institute of Standards and Technology (NIST); Polish State Committee for Scientific Research
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1430608
- Journal Information:
- Physical Review B, Vol. 95, Issue 17; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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