تقرير
Canted antiferromagnetism in phase-pure CuMnSb
| العنوان: | Canted antiferromagnetism in phase-pure CuMnSb |
|---|---|
| المؤلفون: | Regnat, A., Bauer, A., Senyshyn, A., Meven, M., Hradil, K., Jorba, P., Nemkovski, K., Pedersen, B., Georgii, R., Gottlieb-Schönmeyer, S., Pfleiderer, C. |
| المصدر: | Phys. Rev. Materials 2, 054413 (2018) |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science |
| الوصف: | We report the low-temperature properties of phase-pure single crystals of the half-Heusler compound CuMnSb grown by means of optical float-zoning. The magnetization, specific heat, electrical resistivity, and Hall effect of our single crystals exhibit an antiferromagnetic transition at $T_{\mathrm{N}} = 55~\mathrm{K}$ and a second anomaly at a temperature $T^{*} \approx 34~\mathrm{K}$. Powder and single-crystal neutron diffraction establish an ordered magnetic moment of $(3.9\pm0.1)~\mu_{\mathrm{B}}/\mathrm{f.u.}$, consistent with the effective moment inferred from the Curie-Weiss dependence of the susceptibility. Below $T_{\mathrm{N}}$, the Mn sublattice displays commensurate type-II antiferromagnetic order with propagation vectors and magnetic moments along $\langle111\rangle$ (magnetic space group $R[I]3c$). Surprisingly, below $T^{*}$, the moments tilt away from $\langle111\rangle$ by a finite angle $\delta \approx 11^{\circ}$, forming a canted antiferromagnetic structure without uniform magnetization consistent with magnetic space group $C[B]c$. Our results establish that type-II antiferromagnetism is not the zero-temperature magnetic ground state of CuMnSb as may be expected of the face-centered cubic Mn sublattice. Comment: 14 pages, 15 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevMaterials.2.054413 |
| URL الوصول: | http://arxiv.org/abs/1804.03223 |
| رقم الأكسشن: | edsarx.1804.03223 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevMaterials.2.054413 |
|---|