Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Thermodynamics of a delta chain with ferromagnetic and antiferromagnetic interactions


Richter,  Johannes
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Dmitriev V, D., Krivnov, V. Y., Richter, J., & Schnack, J. (2019). Thermodynamics of a delta chain with ferromagnetic and antiferromagnetic interactions. Physical Review B, 99(9): 094410. doi:10.1103/PhysRevB.99.094410.

Cite as: https://hdl.handle.net/21.11116/0000-0003-CA28-D
Motivated by a novel cyclic compound Fe10Gd10 with record ground state spin in which the arrangement of magnetic ions with s = 5/2 and s = 7/2 corresponds to a sawtooth chain, we investigate the thermodynamics of the delta chain with competing ferro-and antiferromagnetic interactions. We study both classical and quantum versions of the model. The classical model is exactly solved and quantum effects are studied using full diagonalization and a finite temperature Lanczos technique for finite delta chains as well as modified spin wave theory. It is shown that the main features of the magnetic susceptibility of the quantum spin delta chain are correctly described by the classical spin model, while quantum effects significantly change the low-temperature behavior of the specific heat. The relation of the obtained results to the Fe10Gd10 system is discussed.