Critical current density and magnetization studies on Bi(Pb)SrCaCuO

Comment on “ Critical current density from magnetization hysteresis data using the critical - state model ”

A recent paper [Physical Review B 64 014508 (2001)] claims to present an exact method to extract the critical current density J C from the M-H hysteresis curve. We show that this claim appears unjustified.

High Critical Current Density Superconductivity

This project was focused on a basic scientific problem, one that is at the heart of application and development of superconductivity for efficient energy usage. This is improvement in high current density which can only be achieved by learning to pin vortices to the physical structure of its underlying superconducting material. Quantized vortices are the tornado of electrical supercurrents, ubi...

High Critical Current Density MgB

Current driven magnetization dynamics in helical spin density waves.

A mechanism is proposed for manipulating the magnetic state of a helical spin density wave using a current. It is shown that a current through a bulk metal with a helical spin density wave induces a spin transfer torque, which gives rise to a rotation of the order parameter. The use of spin transfer torque to manipulate the magnetization in bulk systems does not suffer from the obstacles seen f...

Magnetization Studies on Superconducting VanadiumGallium

Articles you may be interested in Electrical resistivity study of La, B doped nanocrystalline superconducting vanadium nitride Nuclear magnetic resonance studies on the surface magnetism of vanadium ultrafine particles (abstract) The temperature dependence of the critical fields of VaGa has been measured up to 70 kO~ ~sing ac and dc magnetization techniques. For a material with a transition wid...