Ames Laboratory; Physics and Astronomy
Ames Laboratory, Physics and Astronomy
Physical Review Materials
We report investigations of the structural, magnetic, electrical transport, and thermal properties of five compositions of the metallic perovskite GdRh3C1−xBx (0.00≤x≤1.00). Our results show that all five compositions undergo magnetic ordering at low temperatures, but the nature of the ordered state is significantly different in the carbon- and the boron-rich compositions, where the former shows signatures of an amplitude-modulated magnetic structure and the latter exhibits evidence of an equal-moment incommensurate antiferromagnetic ordering. We also observe a remarkable field-dependent evolution of conduction carrier polarization in the compositionally disordered compounds. The outcomes indicate that this system is energetically situated in proximity to a magnetic instability where small variations in the control parameter(s), such as the lattice constant and/or electron density, lead to considerably different ground states.
DOE Contract Number(s)
AC02-07CH11358; 001.254.87581018503; 001.000.8758101.3113101
Iowa State University Digital Repository, Ames IA (United States)