Size effect study of DyMn2O5 nanorods
碩士 === 中原大學 === 物理研究所 === 100 === Two series of DyMn2O5 nanorods were synthesized by hydrothermal method in different time. They have different length by long axis with different annealing temperature. X-ray diffraction revealed the crystal structures are formed as orthorhombic Pbam phase for ea...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2012
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| Online Access: | http://ndltd.ncl.edu.tw/handle/53899004961614738039 |
| Summary: | 碩士 === 中原大學 === 物理研究所 === 100 === Two series of DyMn2O5 nanorods were synthesized by hydrothermal method in different time. They have different length by long axis with different annealing temperature. X-ray diffraction revealed the crystal structures are formed as orthorhombic Pbam phase for each sample. SAED results show that the long side of nanorods is parallel to c axis for all three samples. Magnetic ac susceptibility measurements were used to determinate magnetic properties. Curie-Weiss law is employed to analysis the ac magnetic susceptibility curves. It is found that Néel temperature is increased with increasing length. Antiferromagnetic peaks at around 38 and 43 K were only observed as length longer than 46 nm, which implied a critical length of magnetic ordering at around 50 nm.
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