Magnetization, Magnetostriction and Relaxation Phenomena during Isothermal Magnetic Annealing at High Temperatures in Ni-Co Alloys
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概要
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An apparatus for the precise measurement of magnetostriction and magnetization at high temperatures was constructed, and these magnetic properties in Ni-Co alloys thermally demagnetized have been measured at high temperatures. It was found that these properties showed a remarkable relaxation phenomenon. Their time changes at constant temperature were continuously traced under the external fields of various strengths from the instant of the application of the field onward. The amount of the time change in the magnetostriction becomes large as the strength of field during annealing is large and the annealing duration is long. The effect begins to appear at about 300°and is most remarkable at about 350°, and then gradually decreases, vanishing finally at Curie Point. With progress of annealing, the negative magnetostriction becomes smaller and even turns positive in the case of alloys containing large amounts of cobalts, while the initially positive striction becomes larger. It may be considered that these relaxations are caused by a micro-creep phenomenon in a broad sense of the word, that is, by displacements of impurities or lattice defects due to the magnetostriction at high temperatures.
- 東北大学の論文
著者
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SAITO Hideo
The Research Institute for Iron, Steel and Other Metals
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Masumoto Hakaru
The Research Institute Of Electric And Magnetic Alloys
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Masumoto Hakaru
The Research Institute For Iron Steel And Other Metals
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Saito Hideo
The Research Institute For Iron Steel And Other Metals
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Takahashi Minoru
Department Of Applied Physics Faculty Of Engineering Tohoku University
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Takahashi Minoru
The Research Institute For Iron Steel And Other Metals Tohoku University
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Saito Hideo
The Resarch Institute For Iron Steel And Other Metals
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Takahashi Minoru
The Research Institute For Iron Steel And Other Metals
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