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... achieved with permalloy and perminvar tapes. The rate of telegraph transmission was thereby increased by factors of 10–100. In the 1950’s, with the advent of line repeaters on submarine cable lines and the provision of simultaneous telephone and telegraph communication on them, Krarup loading lost its importance.D. L. S HARLE

... , Manganin, constantan, and Perminvar. However, alloys characterized by substantial change in physical parameters with changes in external conditions are also of practical importance; these include Permalloy, Alumel, Chromel, Copel, magnetostrictive materials, alloys for springs, and bimetals for thermostats.Specialty alloys also include superconductive alloys ...

... textured transformer steel, Perminvar, and such Permalloys as 50 NP and 65 NP. Imparting a texture to these materials reduces the coercive force, hysteresis losses, and other hysteresis-related phenomena. The development of a texture in such hard-magnetic materials as Magnico, Ticonal, and barium and cobalt ferrites increases, for example, the coercive force and ...

... of magnetic permeability (Perminvar), and the combination of high saturation magnetization and magnetic permeability (Permenorm). Such alloys are used in many areas of technology that require high sensitivity of the working elements to changes in the magnetic field.Alloys containing 45–55 percent nickel alloyed with small quantities of copper or cobalt have ...