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Thermoelectric power and resistivity of dilute Ag-Yb alloys at low temperatures 低温下稀银钇合金的热电功率和电阻率
Physica Pub Date : 1974-11-01 DOI: 10.1016/0031-8914(74)90251-1
F.F. Bekker, C.J.A. Van Duren
{"title":"Thermoelectric power and resistivity of dilute Ag-Yb alloys at low temperatures","authors":"F.F. Bekker,&nbsp;C.J.A. Van Duren","doi":"10.1016/0031-8914(74)90251-1","DOIUrl":"10.1016/0031-8914(74)90251-1","url":null,"abstract":"<div><p>Thermoelectric force and resistivity of some dilute Ag-Yb alloys have been measured and analysed in terms of a d-like contribution to the scattering from divalent nonmagnetic Yb. Kondo behaviour is exclusively attributed to traces of iron.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 3","pages":"Pages 609-614"},"PeriodicalIF":0.0,"publicationDate":"1974-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90251-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87033271","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
Cooling by compression of 3He in the mixing chamber of the Leiden alternative dilution refrigerator 在Leiden替代稀释冰箱的混合室中压缩3He冷却
Physica Pub Date : 1974-11-01 DOI: 10.1016/0031-8914(74)90245-6
T. Satoh , R.G. Jurriëns, K.W. Taconis, R. de Bruyn Ouboter
{"title":"Cooling by compression of 3He in the mixing chamber of the Leiden alternative dilution refrigerator","authors":"T. Satoh ,&nbsp;R.G. Jurriëns,&nbsp;K.W. Taconis,&nbsp;R. de Bruyn Ouboter","doi":"10.1016/0031-8914(74)90245-6","DOIUrl":"10.1016/0031-8914(74)90245-6","url":null,"abstract":"<div><p>The mixing chamber of the Leiden alternative dilution refrigerator has been used as a compression cell for Pomeranchuk cooling. A description is given of the construction of this cooling device and its performance. The lowest magnetic temperature reached so far is 1.8 mK.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 3","pages":"Pages 523-531"},"PeriodicalIF":0.0,"publicationDate":"1974-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90245-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88131838","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
Investigations on the saturated moving He II film with a length of up to 200 m 长度达200 m的饱和移动He II膜的研究
Physica Pub Date : 1974-11-01 DOI: 10.1016/0031-8914(74)90250-X
E. Van Spronsen, H.J. Verbeek, H. Van Beelen, R. De Bruyn Ouboter, K.W. Taconis
{"title":"Investigations on the saturated moving He II film with a length of up to 200 m","authors":"E. Van Spronsen,&nbsp;H.J. Verbeek,&nbsp;H. Van Beelen,&nbsp;R. De Bruyn Ouboter,&nbsp;K.W. Taconis","doi":"10.1016/0031-8914(74)90250-X","DOIUrl":"10.1016/0031-8914(74)90250-X","url":null,"abstract":"<div><p>Film flow in long and narrow capillaries has been studied by monitoring bulk-liquid levels. The observed oscillations, the damping and third-sound effects are discussed. Changes in film thickness, due to the superfluid velocity as well as due to acceleration, are observed and discussed together with the vapour-film equilibrium. Our earlier reported observations of the Kontorovich effect are confirmed using a longer capillary (200 m) and for different types of flow.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 3","pages":"Pages 570-608"},"PeriodicalIF":0.0,"publicationDate":"1974-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90250-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73049252","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
Forces in the flow of liquid He II 液体流动中的力He II
Physica Pub Date : 1974-11-01 DOI: 10.1016/0031-8914(74)90243-2
G. Van Der Heijden , A.G.M. Van Der Boog, H.C. Kramers
{"title":"Forces in the flow of liquid He II","authors":"G. Van Der Heijden ,&nbsp;A.G.M. Van Der Boog,&nbsp;H.C. Kramers","doi":"10.1016/0031-8914(74)90243-2","DOIUrl":"10.1016/0031-8914(74)90243-2","url":null,"abstract":"<div><p>Flowing liquid He II through a capillary is studied, for types of flow in which the velocities <em>v</em><sub>n</sub> and <em>v</em><sub>n</sub>, of the normal fluid and the superfluid respectively, can be varied independently. A survey of the measurements from all types of flow is given in diagrams of the (<em>v</em><sub>n</sub>, <em>v</em><sub>n</sub>) plane, in which curves of constant ρ<em>S</em> Δ<em>T</em>, ρΔμ, and Δ<em>P</em> are given. These diagrams include curves for isothermal flow (Δ<em>T</em> = 0), flow without a chemical-potential difference (Δμ = 0), and isobaric flow (Δ<em>P</em> = 0). The results indicate that the normal fluid is moving laminarly both in subcritical flow and supercritical flow. In supercritical flow apart of the mutual friction force <em>F</em><sub>sn</sub>, a frictional force <em>F</em><sub>s</sub>, connected with the superfluid, is observed. A general relation between the ratio <em>F</em><sub>sn</sub>/<em>F</em><sub>s</sub> and the relative velocity (<em>v</em><sub>n</sub>-<em>v</em><sub>s</sub>) is found, which is more complicated than the pattern obtained with pure superfluid flow (paper II, Physica 61 (1972) 566).</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 3","pages":"Pages 487-513"},"PeriodicalIF":0.0,"publicationDate":"1974-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90243-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90765284","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: 17
The temperature and density dependences of the electronic specific heat 温度和密度对电子比热的依赖性
Physica Pub Date : 1974-11-01 DOI: 10.1016/0031-8914(74)90242-0
A. Isihara, D.Y. Kojima
{"title":"The temperature and density dependences of the electronic specific heat","authors":"A. Isihara,&nbsp;D.Y. Kojima","doi":"10.1016/0031-8914(74)90242-0","DOIUrl":"10.1016/0031-8914(74)90242-0","url":null,"abstract":"<div><p>The specific heat of an electron fluid is determined for low but nonzero temperature and for high density based on the first- and second-order exchange graphs and the ring diagrams. The specific heat constant γ is found to increase at lower temperatures for <em>r</em><sub>s</sub> of order 2 or 3. The specific-heat effective mass determined by experiments should increase accordingly. For very small <em>r</em><sub>s</sub> the specific heat is below the ideal-gas value. For <em>r</em><sub>s</sub> = 2, the deviation from a straight line of the specific-heat curve plotted against temperature is expected to start at around 2 K and increases at low temperatures. The temperature dependence is characterized by logarithmic terms.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 3","pages":"Pages 469-486"},"PeriodicalIF":0.0,"publicationDate":"1974-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90242-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81401309","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: 13
Inversion of total cross sections for repulsive ion-atom scattering in the classical regime II 经典状态下排斥性离子-原子散射总截面的反演2
Physica Pub Date : 1974-11-01 DOI: 10.1016/0031-8914(74)90253-5
U. Littmark
{"title":"Inversion of total cross sections for repulsive ion-atom scattering in the classical regime II","authors":"U. Littmark","doi":"10.1016/0031-8914(74)90253-5","DOIUrl":"10.1016/0031-8914(74)90253-5","url":null,"abstract":"<div><p>A previously derived formula for inversion of incomplete total scattering cross sections into ion-atomic potentials is generalized to take into account total cross sections measured as a function of both ion energy <em>and aperture</em>. The formula allows an estimate of the error of the potential determined. Analysis of K<sup>+</sup>-Ar cross sections of Sielanko and coworkers shows that measurements of this are especially valuable not only because of the easy extension of the range in which the potential is determined, but mainly because of the decrease of the error.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 3","pages":"Pages 619-622"},"PeriodicalIF":0.0,"publicationDate":"1974-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90253-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78398427","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
Anomalous skin effect in cylindrical samples 圆柱形样品中的反常趋肤效应
Physica Pub Date : 1974-11-01 DOI: 10.1016/0031-8914(74)90246-8
H.P. Van De Braak, L.J.M. Van De Klundert
{"title":"Anomalous skin effect in cylindrical samples","authors":"H.P. Van De Braak,&nbsp;L.J.M. Van De Klundert","doi":"10.1016/0031-8914(74)90246-8","DOIUrl":"10.1016/0031-8914(74)90246-8","url":null,"abstract":"<div><p>A description is given of the anomalous skin effect in a cylinder placed in an a.c. magnetic field parallel to the cylinder axis. The necessary nonlocal relation between current density and electric field inside the sample is established with the aid of Boltzmann's transport equation. Results are presented in terms of the current density in the sample and its magnetic susceptibility.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 3","pages":"Pages 532-542"},"PeriodicalIF":0.0,"publicationDate":"1974-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90246-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76245955","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: 1
Analytic subject index 分析主题索引
Physica Pub Date : 1974-11-01 DOI: 10.1016/0031-8914(74)90256-0
{"title":"Analytic subject index","authors":"","doi":"10.1016/0031-8914(74)90256-0","DOIUrl":"https://doi.org/10.1016/0031-8914(74)90256-0","url":null,"abstract":"","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 3","pages":"Pages 633-639"},"PeriodicalIF":0.0,"publicationDate":"1974-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90256-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137441999","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
Excitation cross sections of 11S→m1P transitions in helium by electron impact 氦中11S→m1P跃迁的电子冲击激发截面
Physica Pub Date : 1974-11-01 DOI: 10.1016/0031-8914(74)90254-7
U. Narain, S. Chandra
{"title":"Excitation cross sections of 11S→m1P transitions in helium by electron impact","authors":"U. Narain,&nbsp;S. Chandra","doi":"10.1016/0031-8914(74)90254-7","DOIUrl":"10.1016/0031-8914(74)90254-7","url":null,"abstract":"<div><p>The cross sections for electron-impact excitation of ground-state helium to the <em>m</em><sup>1</sup>p (<em>m</em> = 2 to 5) excited states have been calculated in the energy range 0.2–20 keV, semi- empirically. Results indicate small corrections with respect to existing data.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 3","pages":"Pages 623-626"},"PeriodicalIF":0.0,"publicationDate":"1974-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90254-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89069357","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: 1
Dielectric loss and electrical-conductivity studies on copper-doped NH4Cl crystals 掺铜NH4Cl晶体的介电损耗和电导率研究
Physica Pub Date : 1974-11-01 DOI: 10.1016/0031-8914(74)90247-X
Y.V.G.S. Murti, P.S. Prasad
{"title":"Dielectric loss and electrical-conductivity studies on copper-doped NH4Cl crystals","authors":"Y.V.G.S. Murti,&nbsp;P.S. Prasad","doi":"10.1016/0031-8914(74)90247-X","DOIUrl":"10.1016/0031-8914(74)90247-X","url":null,"abstract":"<div><p>A study of copper impurity centres in NH<sub>4</sub>Cl by dielectric loss and electrical-conductivity measurements is reported in this paper. A theory is given for the dielectric loss due to the reorientations of impurity-vacancy dipoles in a CsCl-type lattice by means of jumps of constituent point defects. Expressions are worked out for tan δ associated with various complexes with substitutional and interstitial divalent impurities by considering the atomic kinetics of reorientations. NH<sub>4</sub>Cl: Cu crystals grown from ammoniacal and acidic solutions give one set of loss peaks each and crystals grown from neutral solutions give two sets of loss peaks. These peaks are attributed to two types of interstitial copper centres.</p><p>In crystals grown from neutral solutions suppression of the electrical conductivity with respect to pure crystals is observed. The results are interpreted in terms of anion vacancy motion in the intrinsic region and cation vacancy motion in the extrinsic region and a minimum limit of 2.06 eV is suggested for the Schottky defect-formation energy.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 3","pages":"Pages 543-556"},"PeriodicalIF":0.0,"publicationDate":"1974-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90247-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84756893","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: 9
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