Spin Polarization Measurement
Spin Polarization Measurement - Related Videos
14:18
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Cited by 2 •
2016
A protocol to detect and automate mode locking in a pre-adjusted nonlinear polarization rotation fiber laser is presented. The detection of a sudden change in the output polarization state when mode locking occurs is used to command the alignment of an intra-cavity polarization controller in order to find mode-locking conditions.
01:01
Group Polarization
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2020
Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition. The phenomenon of group polarization explains many actions taken by groups that would not...
09:00
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
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Cited by 6 •
2018
Here, we combine polarization-variable 7-eV laser with spin- and angle-resolved photoemission technique to visualize the spin-orbital coupling effect in solid states.
01:08
Spin–Spin Coupling Constant: Overview
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2024
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1. Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
03:37
Molecular Shape and Polarity
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2020
Dipole Moment of a Molecule Polar covalent bonds connect two atoms with differing electronegativities, leaving one atom with a partial positive charge (δ+) and the other atom with a partial negative charge (δ–), as the electrons are pulled toward the more electronegative atom. This separation of charge gives rise to a bond dipole moment. The magnitude of a bond dipole moment is represented by the Greek letter mu (µ) and is given by the formula shown here, where Q is the magnitude of the...
FAQs
The polarization value comes from the relative difference between spin-up and spin-down populations or their corresponding currents, rather than from their total magnitude alone. A larger imbalance indicates a stronger preference for one orientation, while near-balance indicates weaker net polarization. This distinction lets engineers separate spin selectivity from overall signal strength when comparing materials or devices.
A spin-selective analyzer is central because it distinguishes contributions associated with the two spin orientations before the comparison is made. The measurement therefore links an observed signal to spin-resolved populations or currents, instead of treating all electrons as equivalent. In device engineering, that separation helps reveal whether a material or component supports useful spin-dependent behavior.
Polarization data can be interpreted alongside transport efficiency to show how effectively a material or component carries spin-dependent current. If measured polarization does not support the intended behavior, the result can indicate a performance limitation even when charge transport is present. This makes the measurement useful for evaluating materials before they are incorporated into spintronic sensors, memory elements, or logic components.
The same spin-resolved comparison provides information at both material and device levels. In magnetic materials and electron sources, it helps characterize the strength of the spin-dependent signal. In engineered components, the result indicates whether that signal can contribute to sensing, memory, or logic functions. This connection supports evaluation of electron spin as a complement to charge.
A basic workflow begins by selecting the population, source, material, or device whose spin behavior is being evaluated. A spin-selective analyzer then obtains separate signals associated with the two orientations, or their corresponding currents. The measured values are compared through their relative difference, producing polarization data that can be used to assess transport and device-relevant performance.
Applications span magnetic materials, spin-polarized electron sources, and spintronic devices. Sensors can be assessed for spin-dependent response, while memory and logic components can be examined for behavior that uses electron spin alongside charge. Comparing polarization across these systems helps engineers identify promising material performance, evaluate transport efficiency, and determine whether a component supports its intended function.