{"title":"Phase Transition in CsH 3 (SeO 3 ) 2","authors":"Y. Makita","doi":"10.1143/JPSJ.20.1567","DOIUrl":"https://doi.org/10.1143/JPSJ.20.1567","url":null,"abstract":"Dielectric, pyroelectric, thermal, optical and crystallographic properties of CsH 3 (SeO 3 ) 2 were studied. Various pyroelectric tests indicate essentially no net spontaneous polarization below the Curie point, -128°C. Correspondingly, no ferroelectric hysteresis loop appears; D vs E curves are linear except for an impressive form having the critical field, E c , in a narrow temperature range just below the Curie point, T c , under an applied ac field perpendicular to (100). The critical field increases with decreasing temperature and is given with sufficient approximation by an expression; E c =2.3×10 4 ( T c - T ) 1/2 V/cm. The dielectric constant, e ⊥(100) , shows a peak at the Curie point, which shifts, to lower temperature on application of a biasing dc field. These dielectric results may well be interpreted as a field-induced transition phenomenon from an antiferroelectric state to a paraelectric one. The measurement of specific heat as a function of temperature yields δ S =0.81 cal/mole·deg . The ...","PeriodicalId":269857,"journal":{"name":"Tokyo Sugaku Kaisya Zasshi","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1965-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117105644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Interaction between a Vacancy and a Zr or Ca Atom in Al-10 wt%Zn Binary Alloys","authors":"F. Hashimoto, M. Ohta","doi":"10.1143/JPSJ.19.1501","DOIUrl":"https://doi.org/10.1143/JPSJ.19.1501","url":null,"abstract":"","PeriodicalId":269857,"journal":{"name":"Tokyo Sugaku Kaisya Zasshi","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1964-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114451064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nuclear Magnetic Resonance of Fe 57 in α-Fe 2 O 3","authors":"M. Matsuura, H. Yasuoka, A. Hirai, T. Hashi","doi":"10.1143/JPSJ.17.1147","DOIUrl":"https://doi.org/10.1143/JPSJ.17.1147","url":null,"abstract":"Nuclear magnetic resonance (NMR) of Fe 57 in α-Fe 2 O 3 was studied by using both the steady-state method and the pulsed NMR method. The signal could be observed in the temperature range, where the sample shows the parasitic ferromagnetism. From the experimental results it was concluded that the NMR signal of this sample is due to the nuclei with in the domain wall. The average enhancement factor of the applied rf magnetic field was measured to be about 25,000. The spin lattice relaxation time ( T 1 ) of Fe 57 was distributed between 3 m sec and 100 msec at room temperature, depending upon the intensity of the exciting rf pulse. The values of T 1 could be qualitatively explained by the relaxation mechanism due to the thermal domain wall fluctuation.","PeriodicalId":269857,"journal":{"name":"Tokyo Sugaku Kaisya Zasshi","volume":"485 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133254806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Magnetic Study on Mn 4 N and its Related Compounds","authors":"M. Mekata","doi":"10.1143/JPSJ.17.796","DOIUrl":"https://doi.org/10.1143/JPSJ.17.796","url":null,"abstract":"In order to obtain some informations on the electronic structure of Mn 4 N, the magnetic properties of Mn 4 N compounds, partially substituted by In and Sn respectively, are studied by a newly devised magnetic torsion balance. These compounds show very complicated temperature- and composition-dependences of saturation magnetization and have the magnetic susceptibilities nearly independent of temperature at far above the Curie temperatures. Moreover, the composition dependence of the magnetic moment varies remarkably with the species of substituent metals. These facts may be explained in terms of an intuitive band scheme which leads to the variation of the magnetic moment on each sublattice with temperature. The band scheme of γ-Mn is also discussed in connection with that of Mn 4 N","PeriodicalId":269857,"journal":{"name":"Tokyo Sugaku Kaisya Zasshi","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129474884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A New Compound in the Na 2 O—Fe 2 O 3 System","authors":"C. Rooymans","doi":"10.1143/JPSJ.17.722","DOIUrl":"https://doi.org/10.1143/JPSJ.17.722","url":null,"abstract":"","PeriodicalId":269857,"journal":{"name":"Tokyo Sugaku Kaisya Zasshi","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124286126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Magnetic Hyperfine Structure in the Rotational Spectrum of H 2 CO","authors":"H. Takuma","doi":"10.1143/JPSJ.16.309","DOIUrl":"https://doi.org/10.1143/JPSJ.16.309","url":null,"abstract":"The theory of magnetic hyperfine interaction of an asymmetric rotor molecule with C 2 v symmetry in 1 Σ state was discussed, and the magnetic hyperfine structures in the low frequency rotational spectrum of formalde-hyde were studied with a beam maser. The Δ F =0 and the Δ F =±1 components in the J =4, K -1 =3 and the J =5, K -1 =3 Q -branch transitions were observed with good signal-to-noise ratio. The frequency of the Δ F =0 component of the J =5, K -1 =3 line was measured as 18.275±0.004 Mc. The observed hyperfine structures were analysed with the theory, and the hyperfine coupling constants were determined as α=-13.2±3.4 kc, β=-3.0±3.4 kc and γ=30.2±2.7 kc. The coupling constants were theoretically interpreted, and a proportionality of the hyperfine coupling constans and the rotational g factors for the asymmetric rotor molecule was found. a v arround the proton in H 2 CO was obtained as 1.5×10 24 cm -3 from the comparison of these two quantities.","PeriodicalId":269857,"journal":{"name":"Tokyo Sugaku Kaisya Zasshi","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1961-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116081360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"String theory and quantum gravity.","authors":"T. Yoneya","doi":"10.1142/1196","DOIUrl":"https://doi.org/10.1142/1196","url":null,"abstract":"In this talk I review recent developments in superstring theory. In the first half of the talk I discuss some of the earlier developments in this subject. This includes a review of the status of string theory as a unified theory of gravity and other interactions, the role of duality in string theory, and application of string theory to the problem of information loss near a black hole. In the second half of the talk I review the developments of the last two years. This includes application of duality symmetries, Matrix theory, Maldacena conjecture, and derivation of gauge theory results from string theory. In choosing the list of topics for this talk, I have focussed on those which are likely to be of some interest to non-string theorists, thereby leaving out many of the marvelous technical results in this subject.","PeriodicalId":269857,"journal":{"name":"Tokyo Sugaku Kaisya Zasshi","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129845069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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