摘要:
A now superconducting material comprising a compound oxide represented by the general formula:(Sr,.gamma.).sub.x (La,.delta.).sub.1-x .epsilon..sub.y Cu.sub.1-y O.sub.3-zin which".gamma." represents an element of IIa group of the periodic table except Sr, an atomic ratio of .gamma. to Sr being selected in a range between 1% and 90%,".delta." represents an element of IIIa group of the periodic except La, an atomic ratio of .delta. to La is selected in a range between 1% and 90%,".epsilon." represents a metal element of Vb group of the periodic table, x, y and z are numbers each satisfies ranges of 0.ltoreq.x.ltoreq.1, 0.ltoreq.y.ltoreq.1, and 0.ltoreq.z
摘要:
The invention is an after-treatment of a compound oxide type superconducting material by oxygen plasma to improve the superconducting property of the material. The treatment by oxygen plasma is performed while the material is heated at 500.degree. to 1,000.degree. C.The material may have a form of bulky mass or a form of a thin film deposited on a substrate by physical vapor deposition technique.
摘要:
A now superconducting material comprising a compound oxide represented by the general formula:(Ba, .gamma.)x(.alpha.,.beta.).sub.1-x .epsilon..sub.y Cu.sub.1-y O.sub.3-zin which".gamma." represents an element of IIa group of the periodic table except Ba, an atomic ratio of .gamma. to Ba being selected in a range between 1% and 90%,".alpha." represents Y or La,".beta." represents an element of IIIa group of the periodic but is different from .alpha., an atomic ratio of .beta. to .alpha. is selected in a range between 1% and 90%,".epsilon." represents a metal element of IIIb group of the periodic table,x, y and z are numbers each satisfies ranges of 0.ltoreq.x.ltoreq.1, 0.ltoreq.y.ltoreq.1, and 0.ltoreq.z
摘要:
This invention relates to new superconducting material having a composition represented by the general formula:A.sub.u B.sub.v C.sub.w D.sub.x E.sub.yin which,"A" represents one element selected from a group consisting of IIa group and IIIa group of the Periodic Table,"B" represents one element selected from a group consisting of IIa group and IIIa group of the Periodic Table and may be same as "A","C" represents at least one element selected from a group consisting of vanadium (V), tantalum (Ta), niobium (Nb), chromium (Cr), gallium (Ga), indium (In), cadmium (Cd), tin (Sn), thallium (Tl), lead (Pb), molybdenum (Mo), tungsten (W) and zinc (Zn),"D" represents one element selected from a group consisting of Ib group, IIb group, IIIb group and VIII group of the Periodic Table,"E" represents at least one element selected from a group consisting of oxygen (O), boron (B), carbon (C), nitrogen (N), fluorine (F) and sulfur (S), andeach of "u", "v", "w" and "x" represent a number selected in a range of from 0 to 1, and "y" represent a number which is selected from a range of from 1 to 4. The superconducting material may be perovskite type oxide.
摘要:
A metal electrode formed on an oxide superconductor for electric connection to the oxide superconductor, includes a first layer of Ag in direct contact with the oxide superconductor, and a second layer formed on the first layer. The second layer is formed of noble metal excluding Ag. The metal electrode can be formed by forming a first layer of Ag to cover a whole surface of the oxide superconductor layer, and forming a second layer of noble metal excluding Ag, to cover a whole surface of the first layer, thereby to form a double metal layer, and patterning the double metal layer so as to form a metal electrode composed of the double metal layer.
摘要:
A new high Tc superconducting compound oxide material represented by the general formula:AuBvCwCuxOyin which"A" is selected from the group consisting of magnesium(Mg), calcium(Ca), strontium(Sr) and barium(Ba);"B" is selected from the group consisting of yttrium(Y), lanthanum(La), and lanthanide elements;"C" is selected from the group consisting of vanadium (V), tantalum(Ta), indium(In), and thallium(Tl), and ##EQU1##
摘要:
A process for preparing a superconducting thin film composed of compound oxide such as YBa.sub.2 Cu.sub.3 O.sub.7-.delta. deposited on a substrate such as SrTiO.sub.3. Improvement is in that a heat-treatment of the deposited thin film is carried out in a same chamber in which the thin film of compound oxide is deposited on the substrate without taking the substrate out of said chamber.
摘要:
A process for preparing a thin film of superconducting material is disclosed in which films are deposited from a defined target. The thin films prepared by the process are characterized by high critical temperature of superconductivity and a smaller discrepancy between the critical temperature and the onset temperature at which superconductivity is observed.
摘要:
A superconducting material and a process for producing a superconducting material comprising a compound oxide represented by the general formula:(Ba, .gamma.).sub.x (.alpha.,.beta.).sub.1 -.sub.x .epsilon..sub.y Cu.sub.1-y O.sub.3 -zin which".gamma." represents an element of the IIa group of the periodic table except Ba, an atomic ratio of .gamma. to Ba, being selected in a range between 1% and 90%,".alpha.represents Y or La,".beta." represents an element of the IIIa group of the periodic table but is different from .alpha., an atomic ratio of .beta. to .alpha. being selected in a range between 1 and 90%,".epsilon." represents a metal element of the IIIb group of the periodic table,x, y and z are numbers each satisfies ranges of O.ltoreq.x.ltoreq.1, O.ltoreq.y.ltoreq.1, and O.ltoreq.z.ltoreq.1 respectively, andthe expression of (Ba, .gamma.) and (.alpha., .beta.) mean that the respective elements occupy predetermined sites in a crystal in a predetermined proportion.
摘要翻译:一种超导材料和一种制造超导材料的方法,包括由通式(Ba,(γ))x((α),(β))1-x(ε)yCu1-yO3-z表示的复合氧化物 “(γ”)表示除了Ba之外的周期表IIa族的元素,(γ)与Ba的原子比在1%和90%之间的范围内选择,“(α)表示Y或La ,“(β)”表示周期表IIIa族的元素,但与(α)不同,(β)与(α)的原子比在1至90%的范围内选择,“(ε )“表示周期表IIIb族的金属元素,x,y和z分别为O <= x <= 1,O <= y <= 1,O <= z <= 1 分别表示(Ba,(γ))和((α),(β))表示各元素以预定比例占据晶体中的预定位置。
摘要:
A superconducting material composed mainly of compound oxide having a composition represented by the general formula:Tl.sub.x Ca.sub.y BaCu.sub.z O.sub.pin which "x", "y" and "z" are numbers each satisfies 0.5.ltoreq.x.ltoreq.3.0, 0.5.ltoreq.y.ltoreq.3.0, and 0.9.ltoreq.z.ltoreq.4.0 respectively.
摘要翻译:主要由复合氧化物组成的超导材料,其具有由以下通式表示的组成:TlxCayBaCuzOp,其中“x”,“y”和“z”各自为数,其分别满足0.5≤x≤3.0,0≤y 分别为 = 3.0和0.9 = z = 4.0。