• Nuclear spin-lattice and nuclear spin-spin relaxation time measurements in EuB6 at low temperatures using the spin-echo technique

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    • Keywords

       

      Nuclear spin-lattice relaxation time; nuclear spin-spin relaxation time; spin-echo technique; EuB6

    • Abstract

       

      Experimental results on the nuclear spin-lattice and nuclear spin-spin relaxation times in the ferromagnetic EuB6 at temperatures below 4·2 K are presented using the external magnetic field,Hext, in the range of 0 ⩽Hext ⩽ 10 kG. Nuclear spin-spin relaxation time computed on the basis of the Suhl-Nakamura process turns out to be 3·2µs, which compares well with the experimental value 11·1µs obtained with the 10 kG magnetic field at 1·7 K. It is found that in the ferromagnetic EuB6,T1 is approximately 5 × 103 times larger thanT2 at 1·7 K with the 10 kG magnetic field. Thus the effect ofT1 onT2 can be neglected. From the experimental value ofT2, the value of the homogeneous line broadening is found to be 14 kHz. The corresponding value obtained from the cw method is 175 kHz. This evidently shows the presence of the inhomogeneous line broadening in the cw NMR.

    • Author Affiliations

       

      MM Bajaj1 2 M Kasaya1

      1. Second Department of Physics, Faculty of Science, Tōhoku University, Aramaki, Aoba, Sendai - 980, Japan
      2. Department of Physics and Astrophysics, University of Delhi, Delhi - 110 007, India
    • Dates

       
  • Pramana – Journal of Physics | News

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