physics

Wolfson Centre for Magnetics

Wolfson Centre for Magnetics is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Wolfson Centre for Magnetics rather than just read about it. In short: Wolfson Centre for Magnetics (WCM) is a research and knowledge centre operating within School of Engineering at Cardiff University. Research WCM is a centre for research, teaching and technology transfer over a wide spectrum of magnetics, including magnetic engineering, magnetic materials, magnetic devices, and the physics of magnetism.

Key takeaways

Wolfson Centre for Magnetics belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Wolfson Centre for Magnetics to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Wolfson Centre for Magnetics from memory before moving on to harder problems.

Reference excerpt

Wolfson Centre for Magnetics (WCM) is a research and knowledge centre operating within School of Engineering at Cardiff University.

Research WCM is a centre for research, teaching and technology transfer over a wide spectrum of magnetics, including magnetic engineering, magnetic materials, magnetic devices, and the physics of magnetism. Research within WCM focuses on several areas related to production, characterisation and applications of magnetic materials. The scope of the centre's research activities has recently been broadened by the addition of several new academic staff, allowing the Wolfson Centre for Magnetics to capitalise on the anticipated growth of research opportunities in collaborative, interdisciplinary projects in magnetism and magnetic materials. Computer aided design in magnetics, electromagnetic machines, magnetic imaging, high permeability materials, magnetostriction, magnetic sensors and actuators, nanomagnetic materials, magnetic thin films and multilayers, magnetic material for data storage, theory and modelling of magnetic materials are all areas of research currently under investigation in the centre. Postgraduate research and industrial contract projects are carried out with the support of equipment and research facilities recently upgraded through major infrastructure investments. WCM has collaborative links with leading research groups in magnetics throughout Europe, Asia, North and South America, Japan, China, India and Korea. Its members participate regularly in conferences, networking and collaborative research projects both nationally and internationally.

Facilities The Wolfson Centre for Magnetics has a wide range of state of the facilities within its laboratories, which support the research and industrial consultancy activities. Ongoing investment, including an award from the EPSRC/EST Joint Infrastracture Fund (JIF) in 2003 helped in continuous improvement of existing infrastructure and a Strategic Research Investment Fund (SRIF) awarded in 2005–2006. The existing facilities include:

AC and DC properties The power loss, permeability, apparent power, flux density, magnetic field, Barkhausen noise, magnetostriction characteristics of soft magnetic materials and hard magnetic materials can be measured with a range of test systems under DC, AC and rotational magnetising conditions. These systems enable material in a wide range of geometries to be tested from 0.001 Hz up to 200 kHz with controlled arbitrary waveforms.

Stress and temperature annealing Several of the AC and DC characterisation systems can be used with the sample under stress (±50 kN) or at a pre-defined temperature (varied from −150 °C to +600 °C using an environmental chamber, laboratory oven or oil bath).

Micro/nano scale characterisation High magnification domain observation system uses the longitudinal and polar Kerr effect for dynamic observation of surface domain structures at a maximum rate of 1825 frames per second and maximum magnification of 500 times. Vibrating Sample Magnetometer is used for the DC characterisation of magnetic films, tapes and powders at magnetic fields up to 3 T in the temperature range from 8 K to 1270 K. Magnetic Property Measurement System (MPMS) performs DC characterisation utilising a reciprocating sample and SQUID (superconducting quantum interference device) detection for ultimate resolution at magnetic fields up to 5 T. Physical Property Measurement System (PPMS) enables the measurement of phenomena such as the magnetocaloric effect, magnetostriction and magnetoresistance over a wide range of temperatures at magnetic fields of up to 7 T. Magnetic properties close to the surface of soft magnetic materials can be analysed using the Magneto-Optic Kerr Effect Potter (MOKE) which utilises the transverse Kerr effect to measure magnetisation loops in samples such as ferromagnetic films.

Fabrication of materials There is a magnetic microwire-making room, which is equipped with all units necessary for the production of uncoated and glass-coated amorphous and nanocrystalline wires using rapid quenching from the melt techniques. The room contains:

Pre-alloy preparation unit - capacity 20-200 g, provides 10−6 atm vacuum or inert gas atmosphere. It consist of a quartz chamber and an Edwards Diffstak combined vacuum system. Can be used to prepare metallic pre-alloys containing metals (Fe, Co, Ni), metalloids (P, B, C) and rare earth elements. In rotating-water quenched wires preparation unit - used for the preparation of metallic amorphous and nanocrystalline wires with cross section diameter around 125 μm and length up to 100 m. Glass-coated wires preparation unit - used for the preparation of glass-coated wires (amorphous and nanocrystalline), with diameter 1-50 μm of metallic part and 3-15 μm thickness of the glass coating. An induction heater providing an output power of 5 kW at an operating frequency of up to 400 kHz, which operates with multiple workheads and with induction coils of various geometry is used to supply the power for all the above-mentioned units.

Modelling and simulation The Centre employs electromagnetic design and analysis software. These are used in the simulation of 2D and 3D electromagnetic applications, such as the design and optimization of electrical machines, non-destructive evaluation, sensors and actuators, permanent magnet devices and high frequency applications.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Wolfson Centre for Magnetics

Start with the simplest possible case. Write down what Wolfson Centre for Magnetics claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Wolfson Centre for Magnetics before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Wolfson Centre for Magnetics ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Wolfson Centre for Magnetics

In research: Wolfson Centre for Magnetics appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Wolfson Centre for Magnetics in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Wolfson Centre for Magnetics is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cardiff University, Materials science institutes, Physics research institutes, so understanding it makes those chapters shorter.
In everyday life: Look for Wolfson Centre for Magnetics outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Wolfson Centre for Magnetics in 20 minutes

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Close the page and write down what Wolfson Centre for Magnetics means in your own words.
Compare your version with the excerpt and mark what you missed.
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Frequently asked questions

What is Wolfson Centre for Magnetics in simple terms?

Wolfson Centre for Magnetics (WCM) is a research and knowledge centre operating within School of Engineering at Cardiff University. Research WCM is a centre for research, teaching and technology transfer over a wide spectrum of magnetics, including magnetic engineering, magnetic materials, magnetic…

Why does Wolfson Centre for Magnetics matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Wolfson Centre for Magnetics?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Wolfson Centre for Magnetics.