Experimental percolation studies of two-dimensional honeycomb lattice: Li2Mn1-xTixO3
| Autor: | Kun-Pyo Hong, Youngmi Song, Je-Geun Park, Sanghyun Lee, Ji Yeon Kim, Junghwan Park |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics FOS: Physical sciences Mn element Electron Condensed Matter Physics Magnetic susceptibility Condensed Matter - Strongly Correlated Electrons Lattice (order) Antiferromagnetism General Materials Science Condensed Matter::Strongly Correlated Electrons Phase diagram Solid solution |
| Popis: | Li2MnO3 with a S=3/2 two-dimensional Mn honeycomb lattice has a Neel-type antiferromagnetic transition at TN=36 K with a broad maximum in the magnetic susceptibility at TM=48 K. We have investigated site percolation effects by replacing Mn with nonmagnetic Ti, and completed a full phase diagram of Li2Mn1-xTixO3 solid solution systems to find that the antiferromagnetic transition is suppressed continuously without a clear sign of changes in the Neel-type antiferromagnetic structure. The magnetic ordering eventually disappears at a critical concentration of xc=0.7. This experimental observation is consistent with percolation theories for a honeycomb lattice when one considers up to 3rd nearest-neighbor interactions. This study highlights the importance of interaction beyond nearest neighbors even for Mn element with relative localized 3d electrons in the honeycomb lattice. 6 figures, 1 table J. Phys. Condensed Matter (accepted) |
| Databáze: | OpenAIRE |
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