Complex antiferromagnetic order in the garnet Co3Al2Si3O12
We studied the magnetic properties of the garnet Co3Al2Si3O12 synthesized under 5.5 GPa and 1250 °C by means of dc magnetic susceptibility, neutron powder diffraction, and specific heat. Although the magnetic Co2+ ions form a geometrically frustrated hyper-Kagome lattice, we find that Co3Al2Si3O12 e...
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| Veröffentlicht in: | Physical review. B 2020-04, Vol.101 (14), p.1 |
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| container_title | Physical review. B |
| container_volume | 101 |
| creator | Cui, Q Huang, Q Alonso, Jose A Sheptyakov, Denis DelaCruz, C R Fernández-Díaz, M T Wang, N N Cai, Y Q Li, D Dong, X L Zhou, H D Cheng, J-G |
| description | We studied the magnetic properties of the garnet Co3Al2Si3O12 synthesized under 5.5 GPa and 1250 °C by means of dc magnetic susceptibility, neutron powder diffraction, and specific heat. Although the magnetic Co2+ ions form a geometrically frustrated hyper-Kagome lattice, we find that Co3Al2Si3O12 exhibits a long-range antiferromagnetic order below TN=11K without showing magnetic frustration, i.e., the frustration index f≡|θCW/TN| is close to unity. Refinements from neutron-diffraction data show that Co3Al2Si3O12 forms a complex antiferromagnetic structure characterized by the coexistence of collinear and commensurate spiral magnetic ordering of Co2+ sublattices. Magnetic field induced spin-flop transition at μ0Hc≈4T was also observed below TN. |
| doi_str_mv | 10.1103/PhysRevB.101.144424 |
| format | Article |
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| subjects | Antiferromagnetism Cobalt Kagome lattice Magnetic permeability Magnetic properties Magnetism Neutron diffraction |
| title | Complex antiferromagnetic order in the garnet Co3Al2Si3O12 |
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