Spin frustration and magnetic ordering in triangular lattice antiferromagnet Ca <sub>3</sub> CoNb <sub>2</sub> O <sub>9</sub>
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Bibliographic record
Abstract
We synthesized a quasi-two-dimensional distorted triangular lattice antiferromagnet Ca 3 CoNb 2 O 9 , in which the effective spin of Co 2+ is 1/2 at low temperatures, whose magnetic properties were studied by dc susceptibility and magnetization techniques. The x-ray diffraction confirms the quality of our powder samples. The large Weiss constant θ CW ∼ −55 K and the low Neel temperature T N ∼ 1.45 K give a frustration factor f = | θ CW / T N | ≈ 38, suggesting that Ca 3 CoNb 2 O 9 resides in strong frustration regime. Slightly below T N , deviation between the susceptibility data under zero-field cooling (ZFC) and field cooling (FC) is observed. A new magnetic state with 1/3 of the saturate magnetization M s is suggested in the magnetization curve at 0.46 K. Our study indicates that Ca 3 CoNb 2 O 9 is an interesting material to investigate magnetism in triangular lattice antiferromagnets with weak anisotropy.
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| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
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| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.003 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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