Small-Angle Neutron Scattering of Nanocrystalline Terbium with Random Paramagnetic Susceptibility
Abstract
We report magnetic small-angle neutron scattering (SANS) data for the nanocrystalline rare earth metal Terbium in its paramagnetic state. Whereas critical scattering dominates at large momentum transfer, q, the (magnetic-) field response of the scattering at small q arises from the spatial nonuniformity of the paramagnetic susceptibility tensor. The finding of an interrelation between SANS and the susceptibility suggests a way for characterizing the nonuniform magnetic interactions in hard magnets by neutron scattering.
- Publication:
-
Physical Review Letters
- Pub Date:
- June 2008
- DOI:
- 10.1103/PhysRevLett.100.227202
- Bibcode:
- 2008PhRvL.100v7202B
- Keywords:
-
- 75.50.Tt;
- 75.25.+z;
- 75.30.Gw;
- 81.07.Bc;
- Fine-particle systems;
- nanocrystalline materials;
- Spin arrangements in magnetically ordered materials;
- Magnetic anisotropy;
- Nanocrystalline materials