Detailed neutron diffraction measurements on a single crystalline TbB 2C2 in which magnetic field induced antiferroquadrupolar orderings are realised have been performed to understand characteristics of the transition under zero magnetic field. The results indicate that the magnetic transition phenomena consist of development of at least three magnetic components: (1) a dominant antiferromagnetic component which develops below TN = 21.7 K, (2) a weak long periodic component which develops below about 18 K, and (3) anomalous components with broad magnetic scatterings which develop below about 50 K, which can not be understood by only a short range magnetic ordering. Since these three components develop independently, the transition phenomena in TbB2C2 are much more complicated than expected from a typical λ-type anomaly at TN in the temperature dependence of magnetic specific heat.
- Antiferroquadrupolar ordering
- Diffuse scattering
- Long periodic magnetic structure
- Neutron diffraction
ASJC Scopus subject areas
- Physics and Astronomy(all)