Neutron-Spin Resonance in the Optimally Electron-Doped SuperconductorNd1.85Ce0.15CuO4−δ

MAGNETISATION AND ELECTRON SPIN RESONANCE STUDIES OF TETRAHEDRAL AMORPHOUS CARBON

The magnetisation and electron spin resonance (ESR) spectrum of two specimens of tetrahedral amorphous carbon (ta-C), deposited from a filtered cathodic arc, were measured over a wide temperature range. The magnetisation was found to consist of superparamagnetic, paramagnetic and diamagnetic contributions. The superparamagnetic contribution resembled that recently found in carbon prepared from ...

Universal charge and spin response in optimally doped antiferromagnets.

Charge and spin response in the planar t − J model at finite temperatures are investigated numerically, in the regime corresponding to cuprates at intermediate doping. We show that the local spin correlation function is T-independent, leading to χ ′′ (ω < J) ∝ tanh(ω/2T). The current correlation function C(ω) appears to be T-as well as ω-independent, and the optical conductivity σ ∝ (1 − e −ω/T...

Electron Spin Resonance

The vast majority of magnetic resonance imaging and spectroscopic investigations make use of nuclear magnetic resonance (NMR), exploiting the interactions of atomic nuclei with applied static and radiofrequency magnetic fields. Nevertheless, there exists another important “flavour” of magnetic resonance, called Electron Spin Resonance (ESR) – or, interchangeably, Electron Paramagnetic Resonance...

Electron Spin Resonance

Quantum theory tells us electrons have certain properties such as spin. Any type of angular momentum, including spin, can be coupled with a magnetic field. Such a coupling, along with microwave spectroscopy, can be used to study specific attributes of certain types of materials. This phenomenon is exploited in electron spin resonance (ESR) microwave spectroscopy. Among the materials that can be...

Electron Spin Resonance