تقرير
Relieving the frustration through Mn$^{3+}$ substitution in Holmium Gallium Garnet
| العنوان: | Relieving the frustration through Mn$^{3+}$ substitution in Holmium Gallium Garnet |
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| المؤلفون: | Mukherjee, P., Glass, H. F. J., Suard, E., Dutton, S. E. |
| المصدر: | Phys. Rev. B 96, 140412 (2017) |
| سنة النشر: | 2017 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We present a study on the impact of Mn$^{3+}$ substitution in the geometrically frustrated Ising garnet Ho$_3$Ga$_5$O$_{12}$ using bulk magnetic measurements and low temperature powder neutron diffraction. We find that the transition temperature, $T_N$ = 5.8 K, for Ho$_3$MnGa$_4$O$_{12}$ is raised by almost 20 when compared to Ho$_3$Ga$_5$O$_{12}$. Powder neutron diffraction on Ho$_3$Mn$_x$Ga$_{5-x}$O$_{12}$ ($x$ = 0.5, 1) below $T_N$ shows the formation of a long range ordered ordered state with $\mathbf{k}$ = (0,0,0). Ho$^{3+}$ spins are aligned antiferromagnetically along the six crystallographic axes with no resultant moment while the Mn$^{3+}$ spins are oriented along the body diagonals, such that there is a net moment along [111]. The magnetic structure can be visualised as ten-membered rings of corner-sharing triangles of Ho$^{3+}$ spins with the Mn$^{3+}$ spins ferromagnetically coupled to each individual Ho$^{3+}$ spin in the triangle. Substitution of Mn$^{3+}$ completely relieves the magnetic frustration with $f = \theta_{CW}/T_N \approx 1.1$ for Ho$_3$MnGa$_4$O$_{12}$. Comment: 19 pages, 3 figures, 4 supplementary figures, accepted for publication in Physical Review B as a Rapid Communication |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.96.140412 |
| URL الوصول: | http://arxiv.org/abs/1710.05083 |
| رقم الأكسشن: | edsarx.1710.05083 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.96.140412 |
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