- #1
hershal
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marlon said:Hi, it is the Einstein de Haas-effect
marlon said:Hi, it is the Einstein de Haas-effect
If you have a ferromagnet (that is a material in which neigboring atoms tell their closest neigbors to align their spins in the same direction) and you apply an external B field to align the spins, they will add up to produce a change in angular momentum (you know : J = L+S where S is the spin and L is the angular momentum, J is the TOTAL angular momentum), manifested by the rotation of the magnet.
regards
marlon
The Einstein-De Hass Effect, also known as the spin-rotation or spin-mechanical coupling effect, is a phenomenon observed in ferromagnets where the magnetization of the material changes as a result of its rotation.
The Einstein-De Hass Effect is based on the interaction between the spin of electrons and the rotation of the material. When the material is rotated, the spin of the electrons is affected, causing a change in the magnetization of the material.
The Einstein-De Hass Effect is significant because it provides a way to manipulate the magnetic properties of a material using mechanical means. This has potential applications in the development of spintronic devices and in understanding the relationship between spin and motion in materials.
The Einstein-De Hass Effect was first observed by Albert Einstein and Wander Johannes de Haas in the 1920s. They conducted experiments where they rotated a ferromagnet and measured its magnetization, leading to the discovery of this effect.
Current research on the Einstein-De Hass Effect is focused on understanding the underlying mechanisms and exploring potential applications. This includes investigating the effect in different types of materials, such as antiferromagnets and topological insulators, and studying its potential use in spintronics and quantum computing.