Magnetic field effect on spin-polarized transport in asymmetric multibarrier based on InAs/GaAs/GaSb systems

Significant Change of Metal Cations in Geometric Sites by Magnetic‐Field Annealing FeCo2O4 for Enhanced Oxygen Catalytic Activity

“…Existing experimental studies reveal that the spin polarization of electrons in the outermost orbit can be promoted by applying an extra magnetic field with more unpaired electrons in the 3d-orbit. [38][39][40] The kinetics of the oxygen catalytic performance can be affected by the change in magnetism related to the spin polarization of metallic oxides; [41,42] thus, optimizing the spin-state after magnetic field annealing treatment can favor the oxygen catalytic effect. S1 in the Supporting Information, the FeCo 2 O 4 -M exhibits the smallest ΔE of 0.72 V among those of FeCo 2 O 4 (0.80 V) and the Co-based spinel structure multifunctional electrocatalysts reported in the literature, further indicating that FeCo 2 O 4 -M shows excellent ORR/ OER performance.…”

Direct Magnetic Reinforcement of Electrocatalytic ORR/OER with Electromagnetic Induction of Magnetic Catalysts

“…[ 34 ] On the other hand, according to the previous reports, an external magnetic field could promote the spin polarization of electrons that located at the outermost orbit and could also optimize the arrangement of electrons, thereby playing the better role in catalytic reactions. [ 35–37 ] In this work, the macropores could work like a magnetostatic shield to confine the isotropic magnetic domains and form vortex, thus accelerating electron transitions of Co from the possible low spin states to high spin states, and producing more unpaired electrons at the 3d‐orbit (Figure 1c). [ 38,39 ] Meanwhile, the spin magnetic moment of the Co‐nanodots were also increased, which decreased the activation energy barrier of electron transfer and thus enhanced the oxygen catalytic activity by delivering a more efficient four‐electron transfer process during the oxygen evolution and reduction reactions (Figure 1d).…”

Recent advances in catalyst design and activity enhancement induced by a magnetic field for electrocatalysis

“…On the other hand, according to previous reports, the external magnetic eld can promote the spin polarization of the electrons located in the outermost orbit and optimize the electron arrangement, thus playing a better role in the catalytic reaction. 172,173 In this study, large holes can act as magnetostatic shielding to restrict isotropic magnetic domains and create vortices, thus accelerating the jump of Co electrons from a low spin state to a high spin state, generating more unpaired electrons in the 3d orbit (Fig. 29c).…”