Low Temperature Physics: 40, 36 (2014); https://doi.org/10.1063/1.4850534
Ferrimagnetism of dilute Ising antiferromagnets
Southern Federal University, Institute of Physics, Rostov-on-Don 344090, Russia
Received May 13, 2013
It is shown that nearest-neighbor antiferromagnetic interactions of identical Ising spins on imbalanced bipartite lattice and imbalanced bipartite hierarchical fractal result in ferrimagnetic order instead of antiferromagnetic one. On some crystal lattices dilute Ising antiferromagnets may also become ferrimagnets due to the imbalanced nature of the magnetic percolation cluster when it coexists with the percolation cluster of vacancies. As evidenced by the existing experiments on FepZn1–pF2, such ferrimagnetism is inherent property of bcc lattice so thermodynamics of these compounds at low p can be similar to that of antiferromagnet on imbalanced hierarchical fractal.
PACS: 75.50.Ee Antiferromagnetic materials;
Key words: Ising antiferromagnets, ferrimagnetic order.