Spin glass behavior in La0.7Ca0.23Sr0.07MnO3 nanofibers obtained by electrospinning
This work contributes to the development of new nanostructured mixed valence manganites and to explore and optimize their magnetic properties at 1-D level. Nanofibers of La0.7Ca0.23Sr0.07MnO3 manganite were fabricated using the electrospinning method and three different heat treatments to determin...
Wedi'i Gadw mewn:
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| Awduron Eraill: | , , |
| Fformat: | Artículo |
| Iaith: | English |
| Cyhoeddwyd: |
2019
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| Pynciau: | |
| Mynediad Ar-lein: | https://link.springer.com/article/10.1007%2Fs10948-018-4974-3 |
| Tagiau: |
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| Crynodeb: | This work contributes to the development of new nanostructured mixed valence manganites and to explore and optimize their
magnetic properties at 1-D level. Nanofibers of La0.7Ca0.23Sr0.07MnO3 manganite were fabricated using the electrospinning
method and three different heat treatments to determine how the nanostructure affects its thermomagnetic behavior. From
scanning electron microscopy, nanofibers morphology was observed and average diameters of 75, 94, and 97 nm were identified
after heat treatments of 973, 1073, and 1173 K, respectively. According to X-ray diffraction technique, a single-phase orthorhombic structure was defined for each sample. Average crystallite sizes were determined as 47, 49, and 58 nm. A ferromagnetic
to paramagnetic transition with Curie temperatures of 297, 305, and 314 K were identified, respectively. Furthermore, a glassy
state was induced by nanofibers agglomeration. The spin glass and irreversible temperatures diminished as the magnetic field was
increased and a highly anisotropic state was evidenced for all samples. Thermomagnetic behavior in manganites showed to be
significantly influenced by the one-dimensional structure and exposed how the dimensionality proportionated by the fabrication
method can be used to adjust magnetic properties. |
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