Stripe order and magnetic anisotropy in the $S=1$ antiferromagnet BaMoP$_2$O$_8$
| Autor: | Hembacher, Jan, Badrtdinov, Danis I., Ding, Lei, Sobczak, Zuzanna, Ritter, Clemens, Mazurenko, Vladimir V., Tsirlin, Alexander A. |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 98, 094406 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.98.094406 |
| Popis: | Magnetic behavior of BaMoP$_2$O$_8$ with the spatially anisotropic triangular arrangement of the $S=1$ Mo$^{4+}$ ions is explored using thermodynamic measurements, neutron diffraction, and density-functional band-structure calculations. A broad maximum in the magnetic susceptibility around 46\,K is followed by the stripe antiferromagnetic order with the propagation vector ${\mathbf k}=(\frac{1}{2},\frac{1}{2},\frac{1}{2})$ formed below $T_N\simeq 21$ K. This stripe phase is triggered by a pronounced one-dimensionality of the spin lattice, where one of the in-plane couplings, $J_2\simeq 4.6$ meV, is much stronger than its $J_1\simeq 0.4$ meV counterpart, and stabilized by the weak easy-axis anisotropy. The ordered moment of 1.42(9) $\mu_B$ at 1.5 K is significantly lower than the spin-only moment of 2 $\mu_B$ due to a combined effect of quantum fluctuations and spin-orbit coupling. Comment: 10 pages, 7 figures |
| Databáze: | arXiv |
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