ESR Line Width and Exchange Narrowing in Powder Samples

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概要

• 論文の詳細を見る

• Electron Spin Resonance Spectra of 1-1 Diphenyl-2-Picryl Hydrazyl (DPPH) recrystallized from some aliphatic and aromatic solvents have been studied at room temperature in the X-band region. Measurements of lineshape, linewidth and <I>g</I> value were carried out, all the samples being subjected to microchemical analyses with determination of density and melting point. A theoretical study of ESR linewidths has been carried out by means of the Kubo-Tomita theory of ESR linewidth. A quantitative estimation of dipolar width, exchange frequency, exchange integral and asymptotic Curie temperature for each sample was made. A reduction of exchange narrowing has been suggested to be the main cause of broadening.

• 公益社団法人 日本化学会の論文

著者

• Gupta S.

  Department Of Agricultural And Food Engineering Indian Institute Of Technology Kharagpur

• MISRA B.

  DEPARTMENT OF MATHEMATICS, RAVENSHAW COLLEGE

• Misra B.

  Department of Physics, Allahabad University

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