Proton NMR in YBa2Cu3O6.94Hx (x = 0.2 and 0.5) was carried out in order to obtain information about the behavior of the hydrogen and mechanism of the superconductivity. The hydrogen atoms are moving above 200 K but trapped in the crystal sites below 130 K. Below Tc, T1-1 shows an enhancement and sharp decrease with decreasing temperature. A phase-coherent pulsed spectrometer is employed to measure T1, T2 and inverse line width parameter T2 with a resonance frequency of 33 MHz. A bridge spectrometer is used for the measurements of the line width. A marginal spectrometer is used for the superconducting state of YH0.20 with frequency modulation and frequency sweep.
|Number of pages||3|
|Journal||Journal of Magnetism and Magnetic Materials|
|Volume||90 pt 91|
|Publication status||Published - 1990|
ASJC Scopus subject areas
- Condensed Matter Physics