The Earth is a magnet
... Atoms themselves have magnetic properties due to the spin of the atom’s electrons. Domains: Groups of atoms join so that their magnetic fields These areas of atoms are called “domains” ...
... Atoms themselves have magnetic properties due to the spin of the atom’s electrons. Domains: Groups of atoms join so that their magnetic fields These areas of atoms are called “domains” ...
![L 28 Electricity and Magnetism [5]](http://s1.studyres.com/store/data/001622578_1-908dc8960206010e5106ba81527ae842-300x300.png)
Magnetic Field Variations
... associated with diurnal variations, micropulsations and magnetic storms. The vertical gradient of the vertical component of the earth’s magnetic field at this latitude is approximately 0.025nT/m. This translates into 1nT per 40 meters. The magnetometer we have been using in the field reads to a sens ...
... associated with diurnal variations, micropulsations and magnetic storms. The vertical gradient of the vertical component of the earth’s magnetic field at this latitude is approximately 0.025nT/m. This translates into 1nT per 40 meters. The magnetometer we have been using in the field reads to a sens ...
Magnetism Part I
... Magnetic shielding is a process that limits the magnetic effect between two locations. Shielding is usually done using a number of materials, such as sheet metal, metal mesh, ionized gas, or plasma. The purpose is most often to prevent magnetic fields from interfering with electrical devices. Unlike ...
... Magnetic shielding is a process that limits the magnetic effect between two locations. Shielding is usually done using a number of materials, such as sheet metal, metal mesh, ionized gas, or plasma. The purpose is most often to prevent magnetic fields from interfering with electrical devices. Unlike ...
Magnetic Materials Background: 12. Other Materials
... normal thermal vibration processes, and hence the material shows no change in dimensions. However, above the Curie temperature there is no longer any magnetic ordering and thermal expansion occurs normally. Field induced magnetostriction occurs when magnetic domains align and the dimension change ca ...
... normal thermal vibration processes, and hence the material shows no change in dimensions. However, above the Curie temperature there is no longer any magnetic ordering and thermal expansion occurs normally. Field induced magnetostriction occurs when magnetic domains align and the dimension change ca ...
Magnetometer
Magnetometers are measurement instruments used for two general purposes: to measure the magnetization of a magnetic material like a ferromagnet, or to measure the strength and, in some cases, the direction of the magnetic field at a point in space.The first magnetometer was invented by Carl Friedrich Gauss in 1833 and notable developments in the 19th century included the Hall Effect which is still widely used.Magnetometers are widely used for measuring the Earth's magnetic field and in geophysical surveys to detect magnetic anomalies of various types. They are also used militarily to detect submarines. Consequently, some countries, such as the USA, Canada and Australia classify the more sensitive magnetometers as military technology, and control their distribution.Magnetometers can be used as metal detectors: they can detect only magnetic (ferrous) metals, but can detect such metals at a much larger depth than conventional metal detectors; they are capable of detecting large objects, such as cars, at tens of metres, while a metal detector's range is rarely more than 2 metres.In recent years magnetometers have been miniaturized to the extent that they can be incorporated in integrated circuits at very low cost and are finding increasing use as compasses in consumer devices such as mobile phones and tablet computers.