Large magnetoresistance in metamagnetic CoMnSi _0.88 Ge _0.12 alloy

Abstract

The magneto-transport properties are investigated in metamagnetic CoMnSi 0.88 Ge 0.12 alloy. By applying a magnetic field or increasing temperature, a metamagnetic phase transition from antiferromagnetic to ferromagnetic is observed in this alloy. Around the metamagnetic phase transition, CoMnSi 0.88 Ge 0.12 alloy exhibits a large and negative magnetoresistance effect (∼32%) under a magnetic field of 20 kOe (1 Oe = 79.5775 A/m), which is ascribed to the spin-dependent scattering of conduction electrons.

On the magnetostructural transition in MnCoGeB alloy ribbons

“…In which probably, the dislocations relocate toward the transformation preferential planes. The thermal hysteresis of cycled samples (determined from the second DSC cycle) was found to be > 24 K. However, even if the considerable thermal hysteresis is not suitable for practical applications, this is an extrinsic property, can be reduced by processing [29,30].…”

A meshless method based on moving Kriging interpolation for a two-dimensional time-fractional diffusion equation

“…Meshless methods have been widely used in various fields. [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] Imposing essential boundary conditions is an important and key issue in meshfree methods for lacking the Kronecker delta property, therefore, the imposition of prescribed values is not so straightforward as in the FEM. Many techniques have been proposed, such as Lagrange multipliers, penalty method, or coupling with the FEM, etc.…”

Optimization of fin geometry in heat convection with entransy theory

“…Analyses and enhancement of heat transfer have become important research topics due to the worldwide energy problem since the middle of last century because nearly 80% of the total energy consumption is related to heat transfer. [1][2][3][4][5] Many studies have been conducted to improve or analyze the convective heat transfer because it has broad applications in various engineering areas. [3,4,6,7] For the enhancement of convective heat transfer, researchers have developed some passive techniques, such as mixing the main flow and/or the flow in the wall region by using a rough surface, inserts, etc., reducing the flow boundary layer thickness by using offset strip fins, jet impingement, etc., creating the rotating and/or the secondary flow by using swirl flow device, duct rotation, and so on.…”