Abstract
The temperature dependences of the hyperfine field and the spin-lattice relaxation time T 1 at the interstitial µ + sites in the helically ordered state of MnSi have been measured by the longitudinal µ + SR technique. The hyperfine field at 4.2 K is found to be -(1.55±0.05) kOe which is 17% smaller than that expected from the hyperfine coupling constant in the paramagnetic state A hf =-4.8 kOe/µ B and the ordered moment of 0.39 µ B /Mn. The temperature dependence of the relaxation rate 1/ T 1 shows an intermediate character between weakly ferromagnetic and antiferromagnetic metals based on the self-consistent renormalization (SCR) theory of spin fluctuations. This fact is in contrast to the observed temperature dependence of 1/ T 1 in the paramagnetic state which is in general accord with the prediction of the SCR theory for weakly ferromagnetic metals.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call