Spin dependent impurity effects in the 2D frustrated magnetism of NiGa$_2$S$_4$
| dc.creator | Nambu, Yusuke | |
| dc.creator | Nakatsuji, Satoru | |
| dc.creator | Maeno, Yoshiteru | |
| dc.creator | Okudzeto, Edem K. | |
| dc.creator | Chan, Julia Y. | |
| dc.date | 2008-04-03 | |
| dc.date.accessioned | 2026-07-07T09:30:06Z | |
| dc.date.available | 2026-07-07T09:30:06Z | |
| dc.description | Impurity effects on the triangular antiferromagnets Ni$_{1-x}M_x$Ga$_2$S$_4$ ($M=$ Mn, Fe, Co and Zn) are studied. The 2D frozen spin-disordered state of NiGa$_2$S$_4$ is stable against the substitution of Zn$^{2+}$ ($S=0$) and Heisenberg Fe$^{2+}$ ($S=2$) spins, and exhibits a $T^2$-dependent magnetic specific heat, scaled by the Weiss temperature. In contrast, the substitutions with Co$^{2+}$ ($S=3/2$) spin with Ising-like anisotropy and Heisenberg Mn$^{2+}$ ($S=5/2$) spin induce a conventional spin glass phase. From these comparisons, it is suggested that integer size of Heisenberg spins is important to stabilize the 2D coherent behavior observed in the frozen spin-disordered state. | |
| dc.description | 5 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0804.0504 | |
| dc.identifier | http://arxiv.org/abs/0804.0504 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/158020 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Materials Science | |
| dc.title | Spin dependent impurity effects in the 2D frustrated magnetism of NiGa$_2$S$_4$ | |
| dc.type | text |