Robust noncoplanar magnetism in band filling-tuned (Nd${}_{1-x}$Ca${}_x$)${}_2$Mo${}_2$O${}_7$

Abstract

In the metallic pyrochlore Nd${}_2$Mo${}_2$O${}_7$, the conducting Molybdenum sublattice adopts canted, yet nearly collinear ferromagnetic order with nonzero scalar spin chirality. The chemical potential may be controlled by replacing Nd${}^{3+}$ with Ca${}^{2+}$, 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 (Nd${}_{1-x}$Ca${}_x$)${}_2$Mo${}_2$O${}_7$ (NCMO) with $x\le 0.15$ 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.

arXiv comment22 pages, 9 figures

References in corpus (23)

• Topological Hall effect in the A-phase of MnSi
• Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet
• Topological Hall effect and Berry phase in magnetic nanostructures
• Unusual Hall Effect Anomaly in MnSi Under Pressure
• Skyrmion phase and competing magnetic orders on a breathing kagome lattice
• Nanometric square skyrmion lattice in a centrosymmetric tetragonal magnet
• Chirality driven anomalous Hall effect in weak coupling regime
• Non-Fermi Liquid Behavior and Double-Exchange Physics in Orbital-Selective Mott Systems
• Giant generic topological Hall resistivity of MnSi under pressure
• Liquid-like correlations in single crystalline Y2Mo2O7: an unconventional spin glass
• The chiral Hall effect of magnetic skyrmions from a cyclic cohomology approach
• Effects of Crystal Structure and the On-Site Coulomb Interactions on the Electronic and Magnetic Structure of Pyrochlores $A_2$Mo${}_2$O${}_7$ (A= Y, Gd, and Nd)
• Real space Berry curvature of itinerant electron systems with spin-orbit interaction
• Orbital Dimer Model for Spin-Glass State in Y${}_2$Mo${}_2$O${}_7$
• The chiral Hall effect in canted ferromagnets and antiferromagnets
• Phase competition in the double-exchange model on the frustrated pyrochlore lattice
• Competing phases and topological excitations of spin-one pyrochlore antiferromagnets
• Studies of the Anomalous Hall Effect and Magnetic Structure of Nd2Mo2O7 -Test of the Chirality Mechanism-
• Neutron Scattering Studies of Pyrochlore Compound Nd2Mo2O7 in Magnetic Field
• Floating zone furnace equipped with a high power laser of 1kW composed of five smart beams
• Electronic phase separation in the pyrochlore double-exchange model
• Geometrical Hall effect and momentum-space Berry curvature from spin-reversed band pairs
• Giant Magnetoelastic-Coupling Driven Spin-Lattice Liquid State in Molybdate Pyrochlores

Cited by in corpus (2)

• Spin-orbital liquids and insulator-metal transitions on the pyrochlore lattice
• Metal-insulator transitions in pyrochlore oxides