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Krishnan's first book, Fundamentals and Applications of Magnetic Materials (2016), is an interdisciplinary textbook on magnetism, magnetic materials, and related applications. Written in a pedagogical style, its chapters progress from the physics of magnetism, to magnetic phenomena in materials, to size and dimensionality effects, to applications.
Dunlop DJ, Özdemir Ö, Rock Magnetism: Fundamentals and Frontiers, Cambridge University, 1997. [474] [475] [476] Jiles D, Introduction to Magnetism and Magnetic Materials, 3rd ed, CRC, 2016. [461] [477] Krishnan KM, Fundamentals and Applications of Magnetic Materials, Oxford University, 2016. [478] [479]
3, is in between soft and hard magnetic material and is usually classified as a semi-hard material. [23] It is mainly used for its magnetostrictive applications like sensors and actuators [24] thanks to its high saturation magnetostriction (~200 ppm). Co Fe 2 O 4 has also the benefits to be rare-earth free, which makes it a good substitute for ...
Magnetic 2D materials can be used as a part of van der Waals heterostructures. They are layered materials consisting of different 2D materials held together by van der Waals forces. One example of such structure is a thin insulating/semiconducting layer between layers of 2D magnetic material, producing a magnetic tunnel junction.
GMI is caused by the penetration length that is a measure of how deep an ac electrical current can flow inside an electrical conductor.The penetration length (also known as the skin-depth effect) increases with the square root of the electrical resistivity of the material and is inversely proportional to the square root of the product of the magnetic permeability and the frequency of the ac ...
The oldest known magnetic substance, magnetite (Fe 3 O 4), is ferrimagnetic, but was classified as a ferromagnet before Louis Néel discovered ferrimagnetism in 1948. [2] Since the discovery, numerous uses have been found for ferrimagnetic materials, such as hard-drive platters and biomedical applications.
Magnetic field (green) induced by a current-carrying wire winding (red) in a magnetic circuit consisting of an iron core C forming a closed loop with two air gaps G in it. In an analogy to an electric circuit, the winding acts analogously to an electric battery, providing the magnetizing field , the core pieces act like wires, and the gaps G act like resistors.
Paramagnetic materials have a weak induced magnetization in a magnetic field, which disappears when the magnetic field is removed. Ferromagnetic and ferrimagnetic materials have strong magnetization in a magnetic field, and can be magnetized to have magnetization in the absence of an external field, becoming a permanent magnet. Magnetization is ...