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Heating of manganites by magnetic component of microwave
NOPR - NISCAIR Online Periodicals Repository
View Archive Info| Field | Value | |
| Title |
Heating of manganites by magnetic component of microwave
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| Creator |
Singh, R J
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| Subject |
Manganites
Electron paramagnetic resonance Microwave heating |
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| Description |
454-458
When the dependence of EPR spectra of La₀․₆₇ Pb₀․₃₃ MnO₃ , La₀․₆Pb₀․₄ MnO₃ , La₀․₇ Ba․₃ MnO₃ and La₀․₆₇ Sr₀․₃₃ MnO₃ on microwave power (1-200mW) applied in the EPR instrument was investigated, it was observed that the samples became unusually hot on high microwave power levels. The cause of heat generation has been explained as interaction of the spin of eg electron of Mn³⁺ with the magnetic component of microwave field which ultimately leads to Debye type of relaxation of a physical ensemble, i.e., spin-orbital-lattice polaron . The polaron so created is found to be of 11 Å size and consists of Mn³⁺ ion, its nearest neighbours Mn⁴⁺ and La³⁺ ions and the alkaline earth ions along with oxygen octahedra surrounding Mn-ion sites. |
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| Date |
2008-12-05T06:01:58Z
2008-12-05T06:01:58Z 2007-05 |
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| Type |
Article
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| Identifier |
0019-5596
http://hdl.handle.net/123456789/2520 |
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| Language |
en_US
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| Relation |
G01R27/02; H01F1/00
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| Publisher |
CSIR
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| Source |
IJPAP Vol.45(5) [May 2007]
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