Preservation and detectability of shock-induced magnetization

The detectability, discriminability, and perceived magnitude of painful electrical shock.

Thresholds for sensation, pain, and tolerance were obtained from 20 male and 20 female observers who received trains of electrical pulses applied to the volar forearm. Also determined were estimates of sensory magnitude for a series of stimuli that spanned the pain sensitivity range (PSR) between pain threshold and tolerance, as well as Weber fractions for the discrimination of stimuli at the m...

Theory of shock magnetization of asteroids Gaspra and Ida

Unraveling the simultaneous shock magnetization and demagnetization of rocks

In the natural case of an hypervelocity impact on a planetary or asteroidal surface, two competing phenomena occur: partial or complete shock demagnetizat on of preexisting remanence and acquisition of shock remanent magnetization (SRM). In this paper, to better understand the effects of shock on the magnetic history of rocks, we simulate this natural case through laser shock experiments in con...

Magnetization Dynamics Symmetry in Spin Torque Induced Magnetization Switching

Magnetization dynamics symmetry plays important roles in magnetization switching. Here we study magnetic field and spin torque induced magnetization switching. Spin moment transferring from polarized itinerant electrons to local magnetization provides a magnetization switching mechanism without using external magnetic field. Besides its importance in fundamental magnetization switching dynamics...

Surface induced suppression of magnetization in nanoparticles

A model based on competing exchange interactions is presented for the investigation of nanoparticle magnetization. The ferromagnetic (FM) and antiferromagnetic (AFM) exchange interactions contribute differently at the nanoparticle surface and interior, leading to reduced ferromagnetic order at the surface. This model predicts an unconventional temperature dependence of magnetization and a surfa...