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Physical properties of a quasi-1D Ising S = ½ spin system: Ba4CoPt2O9+Δ
Physical properties of a quasi-1D Ising S = ½ spin system: Ba4CoPt2O9+Δ
- Source :
- Journal of Magnetism and Magnetic Materials, Journal of Magnetism and Magnetic Materials, Elsevier, 2020, ⟨10.1016/j.jmmm.2020.166877⟩
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- International audience; The spin chain oxide Ba 4 CoPt 2 O 9+Δ gathers several features that make it close to a 1D Ising S = 1/2 system: (i) it contains only one type of spins, which are associated to a Kramers doublet with a substantial gap from the first excited state; (ii) these spins exhibit a pronounced uniaxial anisotropy; (iii) their easy-axis is perfectly oriented along the spin chain direction; (iv) the spin chains remain uncoupled down to at least 2 K. It is reported that the magnetic susceptibility, the isothermal magnetization and the specific heat in fields up to 9 T can be well accounted for by the theoretical predictions for 1D Ising S = 1/2 systems, yielding consistent set of values for the Landé factors and the intrachain coupling. The presence of missing spins associated to the oxygen overstoichiometry is taken into account, as well as the polycrystalline nature of the samples which requires to consider angular averages of the anisotropic physical properties.
- Subjects :
- 010302 applied physics
Physics
[PHYS]Physics [physics]
Spins
Condensed matter physics
Oxide
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Magnetic susceptibility
Electronic, Optical and Magnetic Materials
Coupling (physics)
chemistry.chemical_compound
chemistry
Excited state
0103 physical sciences
Ising model
Condensed Matter::Strongly Correlated Electrons
0210 nano-technology
Anisotropy
Spin-½
Subjects
Details
- Language :
- English
- ISSN :
- 03048853
- Database :
- OpenAIRE
- Journal :
- Journal of Magnetism and Magnetic Materials, Journal of Magnetism and Magnetic Materials, Elsevier, 2020, ⟨10.1016/j.jmmm.2020.166877⟩
- Accession number :
- edsair.doi.dedup.....3b7b2ea31c0d7b2822f03c45b9534042
- Full Text :
- https://doi.org/10.1016/j.jmmm.2020.166877⟩