Ames Laboratory; Physics and Astronomy
Ames Laboratory, Physics and Astronomy
Physical Review B
139La nuclear magnetic resonance (NMR) measurements under pressure (p=0–2.64 GPa) have been carried out to investigate the static and dynamic magnetic properties of the itinerant ferromagnet LaCrGe3. 139La-NMR spectra for all measured pressures in the ferromagnetically ordered state show a large shift due to the internal field induction |Bint|∼4 T at the La site produced by Cr ordered moments. The change in Bint by less than 5% with p up to 2.64 GPa indicates that the Cr 3d moments are robust under pressure. The temperature dependence of NMR shift and Bint suggest that the ferromagnetic order develops below ∼50 K under higher pressures in a magnetic field of ∼7.2 T. Based on the analysis of NMR data using the self-consistent-renormalization (SCR) theory, the spin fluctuations in the paramagnetic state well above TC are revealed to be three-dimensional ferromagnetic throughout the measured p region.
DOE Contract Number(s)
AC02-07CH11358; JP15H05882; JP15H05885; JP15K21732; JP18H04321
Iowa State University Digital Repository, Ames IA (United States)