Thermal and magnetic properties of the spin-chain materialPr3RuO7
| Autor: | Shalinee Chikara, Mario Freamat, Gang Cao, V. Durairaj, Joseph W. Brill, X. N. Lin |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
Magnetic moment Condensed matter physics Praseodymium Exchange interaction chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Magnetic susceptibility Electronic Optical and Magnetic Materials Crystal Ferromagnetism Octahedron chemistry 0103 physical sciences Antiferromagnetism Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review B. 72 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.72.014458 |
| Popis: | We present measurements of the magnetic moment and specific heat of single crystals of insulating ${\mathrm{Pr}}_{3}\mathrm{Ru}{\mathrm{O}}_{7}$, with octahedral $\mathrm{Ru}{\mathrm{O}}_{6}$ and pseudocubic $\mathrm{Pr}{\mathrm{O}}_{8}$ chains, separated by layers of sevenfold-coordinate praseodymium ions. The susceptibility indicates that antiferromagnetic order sets in at ${T}_{N}=54\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, with polarization approximately along the chain direction, but the susceptibility anisotropy above ${T}_{N}$ indicates that the exchange interaction is strongly anisotropic, with competing ferromagnetic interactions. This competition presumably gives rise to the observed metamagnetic behavior for applied fields along the chain direction. The specific heat anomaly at ${T}_{N}$ is unusually mean field in shape and roughly consistent with ordering of the moments of the ruthenium ions and the ``chain'' praseodymium ions, whereas the remaining interlayer praseodymium ions appear to be magnetically inert. A Schottky-type anomaly at low temperature, however, suggests that the ``ordered'' chain praseodymium ions are still sensitive to a crystal field. |
| Databáze: | OpenAIRE |
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