Metal Single Crystals

Metal Single Crystals

Production of metallic single crystals is carried out in most modern equipment with highest quality requirements. For crystal growth using the Bridgman-, Czochralski- and zone melting techniques only highest purity starting materials are used. The following metallic single crystals are normally available from the shelf. Please click on view to choose your geometry:

Metal single crystal Crystal geometry Purity Information
Aluminium - Al view geometry 6N view info
Antimony - Sb view geometry 6N2 view info
Bismut - Bi view geometry 5N view info
Cadmium - Cd view geometry 5N view info
Chromium - Cr view geometry 5N view info
Cobalt - Co view geometry 4N view info
Copper - Cu view geometry 5N view info
Dysprosium - Dy view geometry 3N5 view info
Gadolinium - Gd view geometry 4N view info
Germanium - Ge view geometry 6N view info
Gold - Au view geometry 5N view info
Hafnium - Hf view geometry 4N ex Zr view info
Holmium - Ho view geometry 3N5 view info
Indium - In view geometry 6N view info
Iridium - Ir view geometry 4N view info
Iron - Fe view geometry 4N view info
Lead - Pb view geometry 5N view info
Lithium - Li view geometry 2N8 view info
Magnesium - Mg view geometry 5N view info
Molybdenum - Mo view geometry 4N view info
Nickel - Ni view geometry 4N view info
Niobium - Nb view geometry 4N view info
Palladium - Pd view geometry 5N view info
Platinum - Pt view geometry 4N view info
Rhenium - Re view geometry 4N view info
Rhodium - Rh view geometry 4N view info
Ruthenium - Ru view geometry 4N view info
Silicon - Si view geometry 5N view info
Silver - Ag view geometry 5N view info
Tantalum - Ta view geometry 4N view info
Tellurium - Te view geometry 6N view info
Tin - Sn view geometry 6N view info
Titanium* - Ti view geometry 4N view info
Tungsten - W view geometry 5N view info
Vanadium - V view geometry 4N view info
Yttrium - Y view geometry 3N5 view info
Zinc - Zn view geometry 6N view info
Zirconium - Zr view geometry 4N ex Hf* view info

Alloy crystals such as Cu2Ce, CuAu, Cu3Au, Cu3Pd, Cu3Pt, Cu75Mn25, CuNi,CoAl, CoGa, FeAl, FeCr, Fe85Cr15, Fe64Ni36, Fe80Ni20, Nb90W10, NiAl ,Ni3Al, Ni3Al (+Fe), NiFe, Pd97Ni3, Pt7Ni, Pt75Ni25, Pt48Ni52, Pt3Cu, PtCo3, Pt3Cr, Pt10Pd90, PtPd, Pt90Pd10, PtRh, Pt80Rh20, Pt90Rh10,Pt95Rh5, TbCu2, V3Si, W99Re1 are partially on stock as well. Further unlisted alloy crystals can be grown according to specifications of the customer.

Orientation and Polishing

The standard orientations offered for the above crystals are for the cubic system (001), (110) and (111) for hexagonal crystals (0001), (10-10) und (11-20). Other orientations such as (117), (221) or (112) may also be produced, of course. The standard accuracy of the orientation of cut crystals is within < 2°. By surface polishing an accuracy of < 0,1° is achievable. Polishing of the different crystals is performed very gently and where possible done chemomechanically. A surface roughness of better than < 0,03µm is obtained. Based on such a polish an atomically smooth surface may be prepared with a few sputter- and heating cycles or by flame annealing. (Recipes for the surface preparation in UHV are available on request). Given an orientation accuracy of < 0,1° terrace widths of several thousand Angstrom are achieved.

Metal single crystals

Crystal geometry

Metallic single crystals are usually pulled in form of rods. Depending on the metal the rod diameter can be set to values between several millimeters to 100 mm. These rods can be supplied either as raw crystals without further shaping or cut to discs. A standard disc thickness is 1mm. Thicker or thinner discs are supplied on request.

The crystal geometry is shaped according to specifications of the customer by spark erosion. Special geometries, grooves, holes and reference faces (for instance, to indicate a second orientation) are possible without problems. Below a few common examples are listed.

For crystal offers or orders just fill in your desired measures and send us these drawings. - If your design is not included, please fax us your drawing or hand sketch.

"Hat form" with indication of second orientation:

Hat form

Circular groove, reference face to mark a second orientation and hole for a thermocouple:

Circular groove

Holes for keeping crystal in place:

Holes

 

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