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Volume 4 (1980)
- Issue 4 Pages 125-
- Issue 3 Pages 87-
- Issue 2 Pages 39-
- Issue 1 Pages 1-
Volume 4, Issue 2
Displaying 1-5 of 5 articles from this issue
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Toshio Wako1980 Volume 4 Issue 2 Pages 39-43
Published: May 31, 1980
Released on J-STAGE: May 18, 2010
JOURNAL FREE ACCESSDownload PDF (967K) -
Soshin Chikazumi1980 Volume 4 Issue 2 Pages 44-47
Published: May 31, 1980
Released on J-STAGE: May 18, 2010
JOURNAL FREE ACCESSAfter describing a history of Invar alloys, analyses of anomalous temperature dependence of Fe-Ni Invar alloys are introduced. The anomalous magnetic and elastic properties of the same alloys are wellcorrelated with that of thermal expansion. Effect of high magnetic field and that of cold-rolling are also described.View full abstractDownload PDF (678K) -
Masayuki Shiga1980 Volume 4 Issue 2 Pages 47-53
Published: May 31, 1980
Released on J-STAGE: May 18, 2010
JOURNAL FREE ACCESSMagnetovolume effects of ferromagnetic metals, particularly those of Invar alloys, are reviewed. The origins of magnetovolume effects, namely the spontaneous volume magnetostriction and the forced volume magnetostriction, are considered in terms of the localized model and the itinerant electron model. The distinct magnetovolume effects of Invar alloys are discussed based upon these two models. An unified model, in which the characteristics of both models are taken into consideration, is introduced to understand the magnetovolume effects of ferromagnetic metals as well as those of Invar alloys.View full abstractDownload PDF (1027K) -
Masaaki Matsui1980 Volume 4 Issue 2 Pages 54-61
Published: May 31, 1980
Released on J-STAGE: May 18, 2010
JOURNAL FREE ACCESSAfter analyzing the thermal expasion coefficient (αexp) using Grüneisen equation, a low spin state model is introduced to explain the high temperature anomalies of αexp of Invar. Assuming an energy distribution of the low spin state and the distribution of the Zeeman splittings of the high spin state, the calculation of a molecular field approximation reproduces the anomalous deviation of the isothermal magnetization curve from the Brillouin function. The anomalous volume change obtained from the analysis of αexp are well explained by the model. The temperature dependence of the internal field distribution of Invar is also described. For the other magnetic anomalies of Fe-Ni Invar and magnetic properties of Fe-Pt and Fe-Pd Invar alloys, qualitative interpretations from a standpoint of the low spin state model are also described. The possibilities of the low spin state of Fe atom in Invar alloys are discussed.View full abstractDownload PDF (1179K) -
Kazuaki Fukamichi1980 Volume 4 Issue 2 Pages 62-73
Published: May 31, 1980
Released on J-STAGE: May 18, 2010
JOURNAL FREE ACCESSThe Invar effects in Fe-base amorphous alloys are reviewed. After a brief discussion of the magnetic properties of Fe-base amorphous alloys, the Invar effects such as very small thermal expansion and anomalous magnetic properties are summarized. The thermal, electrical and elastic properties of these alloys are also presented. It is concluded that the magnetic, thermal and electrical properties of Fe-base amorphous alloys are very similar to those of FeNi crystalline Invar alloys except for the elastic properties. Finally, the Invar characteristics of Fe-base amorphous alloys are discussed from the practical point of view.View full abstractDownload PDF (1874K)
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