Understanding Magnetic Permeability Magnetic Permeability is a value that expresses how a magnetic material responds to an applied magnetic field. If a material's internal dipoles become easily oriented to an applied magnetic field, that material is regarded as being a high-permeability material. If the material's internal dipoles do not become easily oriented to an applied [...]
HSMAG Customer Contribution: What’s the Deal with Alnico VIII Magnets? I was talking to some of the Seymour Duncan dudes the other day about pickups models deserving greater public awareness. One of the first names on everyone’s lips was the Alternative 8, a a high-output humbucker that uses a powerful alnico VIII magnet in lieu [...]
Magnetic losses Reversible losses are normal behavior for all magnetic materials. As the remanence of the all the magnetic materials decreases with increasing temperature, the temperature coefficient is negative, it is to be expected that the magnetic field of a magnet also will decrease with an increase of the temperature. However, this decrease of magnetic [...]
Neodymium Iron Boron Temperature - Temperature Effects on Neodymium Iron Boron (NdFeB magnets) Temperature characteristics of NdFeB grades: The NdFeB magnets are the strongest magnets available. Up to +150 degrees C, they are stronger than the other Rare Earth magnet, SmCo. At around +150 degrees C and above these Neo magnets perform not as strongly [...]
It is possible to demagnetise a Neodymium magnet by applying an external magnetic field in a direction opposite to the direction of magnetisation (DoM) of the NdFeB magnet. The extent of demagnetisation is a function of the total magnetic circuit (and hence the Intrinsic working point), the temperature (and hence the actual BH curve shape [...]
For note, the effects of temperature and external demagnetising fields are easiest to calculate on NdFeB magnets that may be demagnetised as a result of such exposure if cgs units are used (Gauss, Tesla, MGOe) as cgs units allow faster production of new BH curves. When a new Intrinsic BH curve for Neodymium has been [...]
Magnets measured and graded for strength, quality, etc. here you can learn about it, thanks. Magnets measured and graded Magnet Strength Measurements (B)--The units for measuring the field strength (flux density) of a magnet are Gauss or Tesla. 1 Tesla = 10,000 Gauss. The Earth's magnetic field is on the order of 1 [...]
