Neutron Diffraction Study of Magnetic Ordering in Thulium
Neutron diffraction measurements are made on a singlecrystal specimen of metallic thulium at temperatures from 293 to 4.2 deg K. In the temperature range between 38 and 56 deg K the magnetic structure is similar to the high-temperature form of erbium, namely, a simple oscillating-z-componenttype antiferromagnetic structure. Below 38 deg K additional satellite reflections are observed in the diffraction patterns, from which it is inferred that the sinusoidal modulation is modified below this temperature. At 4.2 deg K the normal lattice reflections show an increase in intensity in zero field, which is consistent with a mean magnetic moment per thulium atom of approximately one Bohr magneton directed parallel to the c axis, The low temperature magnetic structure proposed for thulium is one in which the moments are parallel to the c axis of the crystal but change their orientations according to the sequence 4, 3, 4, 3 - - -The fundamental period of the modulation remains constant over the entire range of temperature at a value corresponding to 3.5 a/sub 3/periods. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-016835
- OSTI ID:
- 4786949
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 3 Vol. 33; ISSN JAPIAU; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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