Neutron diffraction study of the non-Fermi liquid compound CeNiGa₂: magnetic behaviour as a function of pressure and
V Legrand1, W Kockelmann, C D Frost
1LUNAM Université, Université de Nantes-Centrale Nantes, Institut de Recherche en Génie Civil et Mécanique (UMR CNRS 6183), 37 boulevard de l'Université, BP 406, F-44602 Saint-Nazaire cedex, France. vincent.legrand@univ-nantes.fr
Abstract:
The magnetic symmetry and structure of the non-Fermi liquid heavy fermion compound CeNiGa2 has been determined by neutron powder diffraction. The orthorhombic CeNiGa2 compound orders antiferromagnetically below 4.4(2) K at ambient pressure with a magnetic moment magnitude of μCe = 0.80(4) μB for moments aligned along the c-axis. The magnetic (Shubnikov) space group is C2cm'm'm. The nature of the magnetic order of CeNiGa2 is further elucidated by neutron diffraction at elevated pressures up to 4.5 kbar, allowing for the confirmation of a critical pressure PC of about 4.2(2) kbar above which the magnetic moment ordering is suppressed.
Related Concept Videos
Ferromagnetism
Magnetic Susceptibility and Permeability
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
Molecular and Ionic Solids
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR
Paramagnetism


