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 ...
研究了csh3 (SeO 3) 2的介电、热释电、热学、光学和晶体学性质。各种热释电试验表明，在居里点(-128°C)以下基本上没有净自发极化。相应的，没有出现铁电磁滞回线;D与E曲线是线性的，除了一个令人印象深刻的形式，在一个垂直于(100)的交流电场下，临界场E c在居里点T c以下的狭窄温度范围内。临界场随温度的降低而增大，可以用表达式给出;E c =2.3×10 4 (T c - T) 1/ 2v /cm。介电常数e⊥(100)在居里点处显示出一个峰值，在施加偏置直流场时，居里点会向较低的温度移动。这些介电结果可以很好地解释为场诱导的从反铁电态到准电态的过渡现象。比热作为温度函数的测量结果为δ S =0.81卡/摩尔·度。…
{"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}
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.
{"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}
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
为了获得有关 Mn 4 N 电子结构的一些信息，我们利用新设计的磁扭转平衡研究了分别被 In 和 Sn 部分取代的 Mn 4 N 化合物的磁特性。这些化合物的饱和磁化显示出非常复杂的温度和成分依赖性，并且在远高于居里温度时，其磁感应强度几乎与温度无关。此外，磁矩的成分依赖性随取代金属的种类而显著变化。这些事实可以用一个直观的能带方案来解释，该方案导致每个子晶格上的磁矩随温度而变化。γ-锰的能带方案还与锰 4 N 的能带方案进行了讨论。
{"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}
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.
讨论了1 Σ状态下c2v对称不对称转子分子的磁超细相互作用理论，并利用束激射器研究了甲醛低频旋转谱中的磁超细结构。在J =4, K -1 =3和J =5, K -1 =3的Q分支跃迁中，Δ F =0和Δ F =±1分量具有良好的信噪比。J =5, K -1 =3线中Δ F =0分量的频率为18.275±0.004 Mc。对观察到的超细结构进行了理论分析，确定了超细耦合常数为α=-13.2±3.4 kc， β=-3.0±3.4 kc和γ=30.2±2.7 kc，并对超细耦合常数进行了理论解释，发现了超细耦合常数与不对称转子分子的旋转g因子成正比关系。通过对这两个量的比较，得到h2o中质子周围的a v = 1.5×10 24 cm -3。
{"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}
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.
{"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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：