发布求助
文献互助 智能选刊 最新文献

Physica B+C最新文献

筛选
英文 中文
Evaluation of anisotropic non-coincident g2, A2, D, P and gn2 from EPR and endor data by the method of least-squares fitting 用最小二乘拟合方法评价EPR和endor数据的各向异性非重合g2、A2、D、P和gn2
Physica B+C Pub Date : 1988-08-01 DOI: 10.1016/0378-4363(88)90297-5
Sushil K. Misra
{"title":"Evaluation of anisotropic non-coincident g2, A2, D, P and gn2 from EPR and endor data by the method of least-squares fitting","authors":"Sushil K. Misra","doi":"10.1016/0378-4363(88)90297-5","DOIUrl":"10.1016/0378-4363(88)90297-5","url":null,"abstract":"<div><p>Details of a rigorous least-squares (LSF) procedure for the evaluation of the components of non-coincident tensors <span><math><mtext>g</mtext><msup><mi></mi><mn>2</mn></msup></math></span>, <span><math><mtext>A</mtext><msup><mi></mi><mn>2</mn></msup></math></span>, <span><math><mtext>D</mtext></math></span>, <span><math><mtext>P</mtext></math></span> and <span><math><mtext>g</mtext><msub><mi></mi><mn>n</mn></msub><msup><mi></mi><mn>2</mn></msup></math></span> using eigenvalues calculated tt second-order in perturbation for electron-nuclear spin-coupled systems are given. The complexities associated with the presence of non-coincident tensors in the spin Hamiltonian are discussed. Details are provided of how the components of the various tensors can be evaluated by choosing either special, or arbitrary, coordinate axes for their descriptions. The procedure is illustrated by application to the X-band EPR data obtained at room temperature for VO<sup>2+</sup>-doped K<sub>2</sub>C<sub>2</sub>O<sub>4</sub>·H<sub>2</sub>O single crystal. It is found that, for this case, the LSF procedure, based on the use of second-order eigenvalues, as described here, yields the χ<sup>2</sup> value, representing the goodness of fit, one-fortieth that found employing the LSF procedure, based on the use of first-order eigenvalues.</p></div>","PeriodicalId":101023,"journal":{"name":"Physica B+C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0378-4363(88)90297-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83569733","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}
引用次数: 7
Dipole-dipole interactions and the ferroelectric-modulated and modulated-paraelectric phase transitions of NaNO2 偶极子-偶极子相互作用和纳米2的铁电调制和调制准电相变
Physica B+C Pub Date : 1988-08-01 DOI: 10.1016/0378-4363(88)90301-4
Vittorio Massidda
{"title":"Dipole-dipole interactions and the ferroelectric-modulated and modulated-paraelectric phase transitions of NaNO2","authors":"Vittorio Massidda","doi":"10.1016/0378-4363(88)90301-4","DOIUrl":"10.1016/0378-4363(88)90301-4","url":null,"abstract":"<div><p>We consider a body-centered orthorhombic lattice of reorientable point dipoles which interact with each other electrostatically. The lattice constants are those of NaNO<sub>2</sub>, and the dipoles are able to reorient in the <em>bc</em> plane. Using a classical statistical mechanical formalism we find that when the temperature is increased from zero the system undergoes two phase transitions: the first from the ferroelectric to a modulated phase, and the second from the modulated to the totally disordered (paraelectric) phase. The mechanism giving rise to the ferroelectric-modulated phase transition can be described saying that in an intermediate temperature range a state where the entropy is distributed among the dipoles in a modulated way has less free energy than that where all the dipoles are equally disordered.</p></div>","PeriodicalId":101023,"journal":{"name":"Physica B+C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0378-4363(88)90301-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80377271","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}
引用次数: 4
Kink dynamics in hydrogen-bonded solids 氢键固体中的扭结动力学
Physica B+C Pub Date : 1988-08-01 DOI: 10.1016/0378-4363(88)90298-7
A. Gordon
{"title":"Kink dynamics in hydrogen-bonded solids","authors":"A. Gordon","doi":"10.1016/0378-4363(88)90298-7","DOIUrl":"10.1016/0378-4363(88)90298-7","url":null,"abstract":"<div><p>A certain class of kinks responsible for the proton transport in hydrogen-bonded solids is studied. It is shown that their energies are close to those of ionic defects and of transduction for ATP formation. These kinks are obtained as exact solutions of the equation of motion for the protonic dynamics in the case of one-dimensional chains of hydrogen bonds. The stability of kinks is proved.</p></div>","PeriodicalId":101023,"journal":{"name":"Physica B+C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0378-4363(88)90298-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76706972","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}
引用次数: 10
Spectral structure of trebly ionized thorium, Th IV 三电离钍的光谱结构
Physica B+C Pub Date : 1988-08-01 DOI: 10.1016/0378-4363(88)90312-9
P.F.A. Klinkenberg
{"title":"Spectral structure of trebly ionized thorium, Th IV","authors":"P.F.A. Klinkenberg","doi":"10.1016/0378-4363(88)90312-9","DOIUrl":"10.1016/0378-4363(88)90312-9","url":null,"abstract":"<div><p>The level scheme of trebly ionized thorium atoms is extended and the ionization limit is determined at 231 065 cm<sup>−1</sup> (Ky), corresponding to an ionization potential of 28.65 V, with an uncertainty of ±0.03 V. The Stark shifts of low levels in both Th IV and Th III are shown to be connected with the extreme sensitivity of the 5f-orbital to external electric fields, owing to the peculiar shape of the natural effective potential.</p></div>","PeriodicalId":101023,"journal":{"name":"Physica B+C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0378-4363(88)90312-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86585420","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}
引用次数: 12
Theory of FeCl2 metamagnet FeCl2超磁体理论
Physica B+C Pub Date : 1988-08-01 DOI: 10.1016/0378-4363(88)90299-9
Z. Onyszkiewicz, A. Wierzbicki
{"title":"Theory of FeCl2 metamagnet","authors":"Z. Onyszkiewicz,&nbsp;A. Wierzbicki","doi":"10.1016/0378-4363(88)90299-9","DOIUrl":"10.1016/0378-4363(88)90299-9","url":null,"abstract":"<div><p>Two-sublattice collinear Heisenberg-Ising (<em>S</em>=1) metamagnets with uniaxial four-ion anisotropy are investigated by the high-density expansion method. Formulas in approximation including Gaussian fluctuations of the molecular field for magnetization and free energy are obtained. The magnon frequencies are obtained in approximation including free magnons in the molecular field fluctuating in a Gaussian way. The theoretical results fitted for the FeCl<sub>2</sub> metamagnet yield phase diagram and magnon frequencies in better agreement with the experimental results than other existing theories.</p></div>","PeriodicalId":101023,"journal":{"name":"Physica B+C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0378-4363(88)90299-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88160747","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}
引用次数: 8
Effect of geometry on the collective electron oscillations in the X-ray absorption spectra of various metal compounds 几何形状对各种金属化合物x射线吸收光谱中集体电子振荡的影响
Physica B+C Pub Date : 1988-08-01 DOI: 10.1016/0378-4363(88)90305-1
B.K. Agarwal, O.K. Harsh
{"title":"Effect of geometry on the collective electron oscillations in the X-ray absorption spectra of various metal compounds","authors":"B.K. Agarwal,&nbsp;O.K. Harsh","doi":"10.1016/0378-4363(88)90305-1","DOIUrl":"10.1016/0378-4363(88)90305-1","url":null,"abstract":"<div><p>The effect of collective electron oscillations at the surface of the metal compounds has been discussed in the X-ray absorption spectra of several metal compounds. The effect of double plasmon oscillations has also been discussed on the X-ray K or L-absorption edges. As a result of our work, various unexplained chemical shifts have been explained.</p></div>","PeriodicalId":101023,"journal":{"name":"Physica B+C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0378-4363(88)90305-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76112424","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}
引用次数: 0
Index of authors and papers 作者和论文索引
Physica B+C Pub Date : 1988-08-01 DOI: 10.1016/0378-4363(88)90313-0
{"title":"Index of authors and papers","authors":"","doi":"10.1016/0378-4363(88)90313-0","DOIUrl":"https://doi.org/10.1016/0378-4363(88)90313-0","url":null,"abstract":"","PeriodicalId":101023,"journal":{"name":"Physica B+C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0378-4363(88)90313-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137058730","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}
引用次数: 0
Farewell 告别
Physica B+C Pub Date : 1988-08-01 DOI: 10.1016/0378-4363(88)90307-5
P.F.A. Klinkenberg
{"title":"Farewell","authors":"P.F.A. Klinkenberg","doi":"10.1016/0378-4363(88)90307-5","DOIUrl":"https://doi.org/10.1016/0378-4363(88)90307-5","url":null,"abstract":"","PeriodicalId":101023,"journal":{"name":"Physica B+C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0378-4363(88)90307-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137058657","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}
引用次数: 0
Effects of localised transverse magnetic field on the characteristics of a glow discharge 局部横向磁场对辉光放电特性的影响
Physica B+C Pub Date : 1988-08-01 DOI: 10.1016/0378-4363(88)90309-9
V.S. Shirodkar, M.S. Nadkarni, G.S. Nadkarni, S. Radhakrishnan
{"title":"Effects of localised transverse magnetic field on the characteristics of a glow discharge","authors":"V.S. Shirodkar,&nbsp;M.S. Nadkarni,&nbsp;G.S. Nadkarni,&nbsp;S. Radhakrishnan","doi":"10.1016/0378-4363(88)90309-9","DOIUrl":"10.1016/0378-4363(88)90309-9","url":null,"abstract":"<div><p>The characteristics of a gaseous discharge have been studied in the presence of a localised transverse magnetic field applied to a discharge tube. The breakdown voltage and the post breakdown discharge current are found to be dependent on the strength and the position of the applied magnetic field. The position of the magnetic field at which the electrical parameters of the gaseous discharge are more sensitive to the magnetic field has been identified to be very near the cathode end of the negative glow. All the experimental observations in this study have been explained consistently taking into consideration the complexity of the electrical conduction in the presence of the localised magnetic field.</p></div>","PeriodicalId":101023,"journal":{"name":"Physica B+C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0378-4363(88)90309-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90446636","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}
引用次数: 0
Axi-symmetrical bubbles Axi-symmetrical泡沫
Physica B+C Pub Date : 1988-08-01 DOI: 10.1016/0378-4363(88)90310-5
J.G. Linhart, F. Mezzetti
{"title":"Axi-symmetrical bubbles","authors":"J.G. Linhart,&nbsp;F. Mezzetti","doi":"10.1016/0378-4363(88)90310-5","DOIUrl":"10.1016/0378-4363(88)90310-5","url":null,"abstract":"<div><p>A mathematical description of axi-symmetrical bubbles as well as experimental results related to their behaviour at low pressures is presented. It is suggested that in vacuum the film forming the bubble changes into a quasi-membrane.</p></div>","PeriodicalId":101023,"journal":{"name":"Physica B+C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0378-4363(88)90310-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72798658","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}
引用次数: 3
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信