Download e-book for kindle: Applications of Ion Beams to Metals by W. Buckel, B. Stritzker (auth.), S. T. Picraux, E. P.

By W. Buckel, B. Stritzker (auth.), S. T. Picraux, E. P. EerNisse, F. L. Vook (eds.)

ISBN-10: 1468420798

ISBN-13: 9781468420791

ISBN-10: 146842081X

ISBN-13: 9781468420814

Conferences were held long ago on atomic collision phenomena and at the functions of ion beams to semiconductors. although, in the prior 12 months it turned obvious that there's a becoming new sector of lively learn concerning using ion beams to switch and research the fundamental houses of metals. for this reason a topical convention used to be geared up to assemble for the 1st time scientists with quite a lot of backgrounds and pursuits concerning this box. This e-book includes the continue­ ings of the foreign convention on functions of Ion Beams to Metals which was once held in Albuquerque, New Mexico, October 2-4, 1973. a lot of the paintings provided herein represents rules and ideas that have had very little past publicity within the open literature. the applying of ion beams to superconducting prop­ erties for instance is kind of new, as is the bankruptcy on ion triggered floor reactions, which include basically oxidation and corrosion stories of implanted fabrics. those components, in addition to the bankruptcy on implantation alloy formation, point out vital destiny parts of the appliance of ion beams to metals. A studying of the chapters on superconductivity and on oxida­ tion and corrosion can serve to carry one brand new on approximately the entire latest details in those components of the ion beam mod­ ification of metals. A vast standpoint of the oxidation region is given within the invited paper via G. Dearnaley.

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Example text

Voltage criterion, I lJV. Specimen Nb IV 4 after the irradiation exhibits a broad maximum around H = 3 kOe superimposed upon the monotonically decreasing J (H). In addition. the sharp peak near H • characteristic of the unirradiated specimen, is still indic~Eed in the irradiated state. The broad maximum is believed to be caused by a superposition of several maxima due to a matching between the spacing of the fluxoids (varying with the magnetic field) and given spacings of the regular void array, which was shown to be developed in this particular foil(15).

Consequently, the average current density of the foil (field parallel to the surface) is of the order of 7 to 10 X 10 3 A/cm 2 at fields around 2 to 3 kO~, which is in agreement with our experimental data. The small 30 A voids, simultaneously present in the irradiated specimen Nb 44, can be shown to give a negligible contribution to J • Their pinning forces with the fluxoids are much too small. c However. in a quantitative evaluation, one must also include the interactions with dislocation loops present in the material, although their influence is not dominating the effect due to the voids.

The influence of lattice defects on the transition temperature of non-transition element superconductors is well understood today [17]. , Sn) and zero or negative for strong-coupling superconductors (Pb and Hg, respectively). This can be proved by irradiating superconducting films with nonmagnetic ions, as has been done in the case of Sn (with Cu) and Pb (with Zn). Ions which are close to manganese in the periodic table are expected to generate a similar amount of defects in the lattice of the target.

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Applications of Ion Beams to Metals by W. Buckel, B. Stritzker (auth.), S. T. Picraux, E. P. EerNisse, F. L. Vook (eds.)


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