The Mossbauer spectroscopy has been applied to powder and single crystal samples of KFeF 3 between 4.2 K and 300 K. Thin slices of the single crystals with the {111} and {110} plane stressed along the respective plane were used to determine the orientation of the hyperfine field H h f and the principal axes of the EFG tensors ( X , Y , Z ). H h f and Z are parallel to the [111] direction between T N =112 K and ∼65 K. Below ∼65 K a rotation of the principal axes of the EFG tensors takes place. Below T c =41 K ( T c is defined in the text) H h f is still parallel to the [111] direction within 5° but the principal axis Z of the EFG tensors lies in the (1bar10) plane and makes an angle θ (40° at 4.2 K) to the [111] direction. The magnetization has been also measured for a single crystal between 4.2 K and 300 K. The weak ferromagntic moment parallel to the direction was observed below T c . A spin arrangement below T c has been proposed.
在4.2 K ~ 300 K范围内对kfef3粉末和单晶样品进行了穆斯堡尔光谱分析。在{111}和{110}平面沿各自平面受力的单晶薄片上确定了超精细场H H f的取向和EFG张量的主轴(X, Y, Z)。H H f和Z在T N =112 K和~ 65 K之间平行于[111]方向。在~ 65 K以下，EFG张量的主轴发生旋转。在T c =41 K以下(T c在文中定义)H H f仍平行于[111]方向5°以内，但EFG张量的主轴Z位于(1bar10)平面，并与[111]方向成一个角θ(在4.2 K时为40°)。在4.2 K和300 K之间测量了单晶的磁化强度。在温度以下观察到平行于方向的弱铁磁矩。提出了一种低于tc的自旋排列。
{"title":"Mössbauer Study of Magnetic Properties of KFeF 3","authors":"A. Ito, S. Morimoto","doi":"10.1143/JPSJ.39.884","DOIUrl":"https://doi.org/10.1143/JPSJ.39.884","url":null,"abstract":"The Mossbauer spectroscopy has been applied to powder and single crystal samples of KFeF 3 between 4.2 K and 300 K. Thin slices of the single crystals with the {111} and {110} plane stressed along the respective plane were used to determine the orientation of the hyperfine field H h f and the principal axes of the EFG tensors ( X , Y , Z ). H h f and Z are parallel to the [111] direction between T N =112 K and ∼65 K. Below ∼65 K a rotation of the principal axes of the EFG tensors takes place. Below T c =41 K ( T c is defined in the text) H h f is still parallel to the [111] direction within 5° but the principal axis Z of the EFG tensors lies in the (1bar10) plane and makes an angle θ (40° at 4.2 K) to the [111] direction. The magnetization has been also measured for a single crystal between 4.2 K and 300 K. The weak ferromagntic moment parallel to the direction was observed below T c . A spin arrangement below T c has been proposed.","PeriodicalId":269857,"journal":{"name":"Tokyo Sugaku Kaisya Zasshi","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126103914","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 phase transition of NaNO 3 crystal associated with the ordering of the orientation of NO 3 - ion has been investigated by X-ray scattering. The experimental results have been analyzed on a microscopic basis to obtain pair interactions between NO 3 - ions. The results are summarized as follows. (i) The ellipsoidal distribution of critical diffuse scattering in the reciprocal space is explained by taking the pair interactions up to second nearest neighbours. (ii) The temperature dependence of critical scattering gives a reasonable agreement with theoretical values in random phase approximation in the temperature range of T > T c +4.5 K. (iii) Both the temperature dependence of long range order parameter and of anomalous lattice expansion can be satisfactorily explained by taking the strain dependence of pair interaction energy into account.
用x射线散射法研究了纳米3晶体的相变与no3离子取向顺序的关系。对实验结果进行了微观分析，得到了no3 -离子之间的对相互作用。结果总结如下:(i)临界漫射散射在互易空间中的椭球分布是通过取到第二近邻的对相互作用来解释的。(ii)临界散射的温度依赖性与随机相位近似的理论值在T > T c +4.5 k的温度范围内有较好的一致性。(iii)考虑到对相互作用能的应变依赖性，可以很好地解释远程序参量和反常晶格展开的温度依赖性。
{"title":"X-Ray Study of Phase Transition in NaNO 3","authors":"H. Terauchi, Y. Yamada","doi":"10.1143/JPSJ.33.446","DOIUrl":"https://doi.org/10.1143/JPSJ.33.446","url":null,"abstract":"The phase transition of NaNO 3 crystal associated with the ordering of the orientation of NO 3 - ion has been investigated by X-ray scattering. The experimental results have been analyzed on a microscopic basis to obtain pair interactions between NO 3 - ions. The results are summarized as follows. (i) The ellipsoidal distribution of critical diffuse scattering in the reciprocal space is explained by taking the pair interactions up to second nearest neighbours. (ii) The temperature dependence of critical scattering gives a reasonable agreement with theoretical values in random phase approximation in the temperature range of T > T c +4.5 K. (iii) Both the temperature dependence of long range order parameter and of anomalous lattice expansion can be satisfactorily explained by taking the strain dependence of pair interaction energy into account.","PeriodicalId":269857,"journal":{"name":"Tokyo Sugaku Kaisya Zasshi","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1972-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124429564","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":"Crystal Growth of Pb(Cd 1⁄3 Nb 2⁄3 )O 3 and Its Dielectric Properties","authors":"N. Ichinose, Takashi Takahashi, Y. Yokomizo","doi":"10.1143/JPSJ.31.1848","DOIUrl":"https://doi.org/10.1143/JPSJ.31.1848","url":null,"abstract":"","PeriodicalId":269857,"journal":{"name":"Tokyo Sugaku Kaisya Zasshi","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1971-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127964077","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}
K. Yagi, Y. Saji, T. Ishimatsu, Y. Ishizaki, M. Matoba, Y. Nakajima, C. Y. Huang
{"title":"Level Structure of 118 Sn from a 119 Sn (p, d) Reaction","authors":"K. Yagi, Y. Saji, T. Ishimatsu, Y. Ishizaki, M. Matoba, Y. Nakajima, C. Y. Huang","doi":"10.1143/JPSJ.24.1167","DOIUrl":"https://doi.org/10.1143/JPSJ.24.1167","url":null,"abstract":"","PeriodicalId":269857,"journal":{"name":"Tokyo Sugaku Kaisya Zasshi","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1968-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122164725","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 composition and decomposition of M centers in additively colored KCl crystals have been examined by the thermal procedures. When a crystal is kept at a temperature between 320°K and 480°K after quenching from about 870°K or after F light irradiation at room temperature, to produce excess M centers, the growth or bleaching of the M band is found to proceed in accordance with a bimolecular reaction, by which the F 2 model of the M center is supported. From the rate constant of the reaction the mean activation energies for the jump of an F center and for the dissociation of an M center are obtained as 0.94 ev and 1.11 ev, respectively. The binding energy of an M center is estimated as 0.18 ev from the mean value of those obtained from the temperature dependence of the thermal equilibrium constant for (F{rightleftarrows}M) and from the difference between the dissociation energy of an M center and the jump energy of an F center.
{"title":"Thermal Conversions of FightleftarrowsM in Additively Colored KCl Crystals","authors":"M. Hirai, T. Matsuyama","doi":"10.1143/JPSJ.22.1005","DOIUrl":"https://doi.org/10.1143/JPSJ.22.1005","url":null,"abstract":"The composition and decomposition of M centers in additively colored KCl crystals have been examined by the thermal procedures. When a crystal is kept at a temperature between 320°K and 480°K after quenching from about 870°K or after F light irradiation at room temperature, to produce excess M centers, the growth or bleaching of the M band is found to proceed in accordance with a bimolecular reaction, by which the F 2 model of the M center is supported. From the rate constant of the reaction the mean activation energies for the jump of an F center and for the dissociation of an M center are obtained as 0.94 ev and 1.11 ev, respectively. The binding energy of an M center is estimated as 0.18 ev from the mean value of those obtained from the temperature dependence of the thermal equilibrium constant for (F{rightleftarrows}M) and from the difference between the dissociation energy of an M center and the jump energy of an F center.","PeriodicalId":269857,"journal":{"name":"Tokyo Sugaku Kaisya Zasshi","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1967-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133304183","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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