Abstract
The Knight shift and the nuclear spin-lattice relaxation rate (1/ T 1 ) of 105 Pd nuclei has been measured in an exchange-enhanced paramagnet Pd metal, in the temperature range between 4.2 and 300 K. Frorn the Knight shift measurement the core polarization hyperfine field is obtained to be -(3.39±0.03)×10 5 Oe/µ B . 1/ T 1 is proportional to temperature with the value, 1/( T 1 T )=1.35±0.03 sec -1 K -1 , below about 150 K, while 1/ T 1 begins to deviate from this relation to smaller values at higher temperature. Relaxation rate due to d-electron spin, (1/ T 1 ) d , was obtained by subtracting the estimated values of other contributions from measured 1/ T 1 . Frorn the value and the temperature dependence of (1/ T 1 ) d , we conclude that (1/ T 1 ) is mostly determined by the long wavelength component of the spin fluctuation in the whole temperature range.
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