In the metallic pyrochlore Nd2Mo2O7, the conducting Molybdenum sublattice adopts canted, yet nearly collinear ferromagnetic order with nonzero scalar spin chirality. The chemical potential may be controlled by replacing Nd3+ with Ca2+, while introducing only minimal additional disorder to the conducting states. Here, we demonstrate the stability of the canted ferromagnetic state, including the tilting angle of Molybdenum spins, in (Nd1−xCax)2Mo2O7 (NCMO) with x≤0.15 using magnetic susceptibility measurements. Mo-Mo and Mo-Nd magnetic couplings both change sign above x=0.22, where the canted ferromagnetic state gives way to a spin-glass metallic region. Contributions to the Curie-Weiss law from two magnetic sublattices are separated systematically.
@article{arxiv.2103.04295,
title = {Robust noncoplanar magnetism in band filling-tuned (Nd$_{1-x}$Ca$_x$)$_2$Mo$_2$O$_7$},
author = {Max Hirschberger and Yoshio Kaneko and Leonie Spitz and Taro Nakajima and Yasujiro Taguchi and Yoshinori Tokura},
journal= {arXiv preprint arXiv:2103.04295},
year = {2021}
}