Published 2019
| Version v1
Publication
From Tb3Ni2 to Tb3CoNi: The interplay between chemistry, structure, and magnetism
Description
Formation, crystal structure, and macroscopic and microscopic magnetism of the binary Tb3Ni2 and derivative
pseudobinary Tb3CoxNi2-x phases have been investigated using an array of experimental methods.While Tb3Ni2
crystallizes in the monoclinic Dy3Ni2 structure type (mS20, C2/m), the substitution of Co for Ni results in
a structural transition into the rhombohedral Er3Ni2 type (hR45, R¯3h) at x(Co) ≈ 0.34 and beyond in the
Tb3CoxNi2-x system. In both the monoclinic and rhombohedral phases, the addition of Co leads to an anisotropic
change of lattice parameters and unexpected reduction of the cell volume. Measurements of bulk properties
reveal that these compounds order ferrimagnetically or ferromagnetically at about 100 K. Complex noncollinear
ferromagnetic ordering in the Tb sublattices is weakly dependent on composition. For x > 0.34 the long-range
magnetic ordering leads to a strong anisotropic magnetostriction accompanied by a symmetry reduction from
rhombohedral to triclinic.
Additional details
Identifiers
- URL
- http://hdl.handle.net/11567/940237
- URN
- urn:oai:iris.unige.it:11567/940237