Jagath Gunasekera

Metallic nickel silicides: Experiments and theory for NiSi and first principles calculations for other phases

Abstract We report detailed experimental investigation of the transport and magnetic properties of orthorhombic NiSi along with first principles studies of this phase and related nickel silicides. Neutron scattering shows no evidence for magnetism, in agreement with first principles calculations. Comparison of first principles results and experimental results from our measurements and literature show a weak electron phonon coupling. We discuss transport and other properties of NiSi and find behavior characteristic of a weak correlated metal far from magnetism. Trends among the nickel silicides as a function of nickel content are discussed.

Quasi-local critical nature of cooperative paramagnetic fluctuations in CaRuO

We report the observation of cooperative paramagnetic fluctuations of

_3

{\mathrm{Ru}}^{4+}

metal

spins that coexist with the non-Fermi-liquid state in

Magnetic fluctuations driven insulator-to-metal transition in Ca(Ir(1-x)Rux)O3.

{\mathrm{CaRuO}}_{3}

Temperature-dependent magnetism in artificial honeycomb lattice of connected elements

perovskite below

Magnetic phase competition in Dy1−xYxMnO3

T\ensuremath{\simeq}21

Phase diagram and dynamics in Er1−xYxMnO3

K. Detailed electrical, magnetic, and neutron scattering measurements reveal that the

Quantum Magnetic Properties in Perovskite with Anderson Localized Artificial Spin-1/2

{\mathrm{Ru}}^{4+}

Electronic nature of the lock-in magnetic transition in CeXAl4Si2

ions reside in magnetic-field-independent random domains with dynamic properties that are reminiscent of the cooperative paramagnetic fluctuations. The linear (