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Related Concept Videos

Torque01:10

Torque

Torque is an important quantity for describing the dynamics of a rotating rigid body. We see the application of torque in many ways in the world, such as when pressing the accelerator in a car, which causes the engine to apply additional torque on the drivetrain. Here, we define torque and provide a framework to create an equation to calculate torque for a rigid body with fixed-axis rotation.
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Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

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Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

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Mechanisms of Heat Transfer01:14

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Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

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.
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Updated: Jun 12, 2026

Magnetic Tweezers for the Measurement of Twist and Torque
11:41

Magnetic Tweezers for the Measurement of Twist and Torque

Published on: May 19, 2014

Evidence for thermal spin-transfer torque.

Haiming Yu1, S Granville, D P Yu

  • 1Ecole Polytechnique Fédérale de Lausanne, IPMC, Station 3, CH-1015 Lausanne-EPFL, Switzerland.

Physical Review Letters
|May 21, 2010
PubMed
Summary
This summary is machine-generated.

Researchers observed that heat currents influence the switching behavior of Co/Cu/Co spin valves in copper nanowires. This suggests a thermal spin-transfer torque effect, linking heat, charge, and spin currents.

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Last Updated: Jun 12, 2026

Magnetic Tweezers for the Measurement of Twist and Torque
11:41

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Published on: May 19, 2014

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
09:01

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Uncoupling Coriolis Force and Rotating Buoyancy Effects on Full-Field Heat Transfer Properties of a Rotating Channel
10:03

Uncoupling Coriolis Force and Rotating Buoyancy Effects on Full-Field Heat Transfer Properties of a Rotating Channel

Published on: October 5, 2018

Area of Science:

  • Condensed matter physics
  • Spintronics
  • Nanotechnology

Background:

  • Spin valves are crucial for magnetic sensors and memory devices.
  • Understanding spin-transfer torque is key to developing spintronic technologies.
  • Heat currents can potentially influence magnetic properties.

Purpose of the Study:

  • To investigate the impact of heat currents on Co/Cu/Co spin valves.
  • To explore the role of thermal effects in spin-transfer torque.
  • To establish a thermodynamic model for coupled currents.

Main Methods:

  • Fabrication of Co/Cu/Co spin valves within Cu nanowires.
  • Measurement of second harmonic voltage response to applied current.
  • Analysis of switching field and voltage response dependence on heat current.

Main Results:

  • Significant heat currents were achieved in the spin valves.
  • Switching fields and voltage response magnitudes were found to be heat current-dependent.
  • Experimental results provide evidence for thermal spin-transfer torque.

Conclusions:

  • Heat currents exert a significant influence on spin valve switching.
  • A thermodynamic model incorporating Onsager reciprocity relations successfully explains the observed phenomena.
  • This work highlights the interplay between thermal, charge, and spin currents in magnetic nanostructures.