IRON-BASED COMPOSITION FOR MAGNETOCALORIC EFFECT (MCE) APPLICATIONS AND METHOD OF MAKING A SINGLE CRYSTAL

A method of making a single crystal comprises heating a material comprising magnetic anisotropy to a temperature T sufficient to form a melt of the material. A magnetic field of at least about 1 Tesla is applied to the melt at the temperature T, where a magnetic free energy difference Gm between dif...

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Bibliographische Detailangaben
Hauptverfasser:	KISNER ROGER A, WILGEN JOHN B, RIOS ORLANDO, SEFAT ATHENA S, LUDTKA GAIL MACKIEWICZ, LUDTKA GERARD MICHAEL, PARISH CHAD M, WEST DAVID L, EVANS, III BOYD MCCUTCHEN, MELIN ALEXANDER M, NICHOLSON DONALD M
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR BASIC ELECTRIC ELEMENTS CHEMISTRY CRYSTAL GROWTH ELECTRICITY INDUCTANCES MAGNETS METALLURGY PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH TRANSFORMERS UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL
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Beschreibung
Zusammenfassung:	A method of making a single crystal comprises heating a material comprising magnetic anisotropy to a temperature T sufficient to form a melt of the material. A magnetic field of at least about 1 Tesla is applied to the melt at the temperature T, where a magnetic free energy difference Gm between different crystallographic axes is greater than a thermal energy kT. While applying the magnetic field, the melt is cooled at a rate of about 30° C./min or higher, and the melt solidifies to form a single crystal of the material.