Zero-field NMR has been observed at 4.2 K and 77 K in the mixed compounds Mn_(1-t) Cr_t As(0≤t≤0.38).in the ferromagnetic NiAs-type phase of MnAs at 4.2 K,quadrupolar split^55Mn and 75^As NMR are observed at 236 and 208 MHz, respectively.
Above the composition t=0.10 of Mn_(1-t) Cr_t As, another NMR line is observed in the region from about 165 to 210 MHz and is assigned to the 55~Mn and 75~As NMR in the double helical magnetic state of MnP-type phase.
It suggests that the Mn spins in MnP-type phase take the value close to a low spin state.
強磁性および二重ラセン磁性相Mn_(1-t) Cr_t AsのNMR
