magnetization
Let an agent explain magnetisation and its measurement, relate it to magnetic field quantities and material types, and support calculations and materials questions.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain magnetisation and its measurement, relate it to magnetic field quantities and material types, and support calculations and materials questions.
A vector quantity expressing the magnetic moment per unit volume of a material, measured in amperes per metre, arising from the alignment of atomic magnetic moments, including spin and orbital contributions; magnetisation describes how strongly a material is magnetised in response to a field or permanently, as in ferromagnets.
What it is for: Describing magnetic materials.
It can be explain magnetisation and its units; relate M, H and B; describe magnetisation curves and hysteresis; classify magnetic materials.
Distinguishing features
Magnetic moment per volume
Vector quantity
Material property
Spin and orbital origins
What it looks like
Not visible; measured with magnetometers and shown on curves.
How it is recognised
Symbol M in amperes per metre
Hysteresis loops for ferromagnets
Magnetic field strength H is a separate quantity
Related models
is a kind of - category
is a kind of - category
is related to - electric current
is related to - SI units
In practice
Families and kinds
spontaneous magnetisation in ferromagnets
induced magnetisation in paramagnets and diamagnets
orbital magnetisation
saturation and remanent magnetisation
Standards and regulation
SI units and ISO 80000-6
Magnetic materials standards such as IEC 60404
Failure modes and hazards
Confusing M, H and B
Unit system confusion between SI and CGS
Demagnetising field errors
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.magnetization-attribute
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Define What magnetisation is.
Moment per volume.
Quantity
Definition and units.
Quantity
Definition.
- How is magnetisation defined, and what are its SI and CGS units? definition
- How does it relate to magnetic moment? definition
Relations
M, H and B.
Relations
Relations.
- How are magnetisation, field strength and flux density related? definition
- What is magnetic susceptibility? definition
Materials Material behaviour.
Materials differ.
Classes
Types of magnetism.
Classes
Types of magnetism.
- Is this material ferromagnetic, paramagnetic, diamagnetic or antiferromagnetic? definition
- What is its saturation magnetisation? measurement
Hysteresis
Curves.
Hysteresis
Hysteresis.
- What do the hysteresis loop, remanence and coercivity of this material indicate? definition
- Is it a hard or soft magnetic material? definition
Measure Measurement.
Instruments and corrections.
Methods
Measuring M.
Methods
Methods.
- How is magnetisation measured, for example with a vibrating sample magnetometer? provenance
- How is the demagnetising field corrected? action
Origins
Spin and orbital.
Origins
Origins.
- What are the spin and orbital contributions to magnetisation? definition
- How is orbital magnetisation computed in modern theory? provenance
Apply Applications.
Magnets at work.
Devices
Uses.
Devices
Uses.
- How does magnetisation matter in motors, storage and sensors? provenance
- Which materials are used? provenance
Teach
Teaching.
Teach
Teaching.
- How can magnetisation be taught with demonstrations? action
- Which misconceptions arise? provenance
What the second pass must settle
- Should hysteresis be a separate entry?
- How should materials data be linked?
- How should unit conversions be recorded?