Chemical synthesis of monodisperse and magnetic alloy nanocrystal containing thin films
AssigneeInternational Business Machines Corporation
InventorsChristopher Bruce Murray, Shouheng Sun, Dieter K. Weller
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Abstract
A method and structure for forming magnetic alloy nanoparticles includes forming a metal salt solution with a reducing agent and stabilizing ligands, introducing an organometallic compound into the metal salt solution to form a mixture, heating the mixture to a temperature between 260° and 300° C., and adding a flocculent to cause the magnetic alloy nanoparticles to precipitate out of the mixture without permanent agglomeration. The deposition of the alkane dispersion of FePt alloy particles, followed by the annealing results in the formation of a shiny FePt nanocrystalline thin film with coercivity ranging from 500 Oe to 6500 Oe.
Claims16
A method of forming magnetic alloy nanoparticles, comprising:
- forming a metal salt solution with a reducing agent and stabilizing ligands;
- introducing an organometallic compound into said metal salt solution to form a mixture;
- heating said mixture to a temperature between 260° and 300° C. to effectuate reduction of said metal salt solution and decomposition of said organometalllic compound;
- and
- adding a flocculent to cause said magnetic alloy nanoparticles to precipitate out of said mixture without permanent agglomeration.
A method of forming a magnetic storage device having magnetic alloy nanoparticles, comprising:
- forming a metal salt solution with a reducing agent and stabilizing ligands;
- introducing an organometallic compound into said metal salt solution to form a mixture;
- heating said mixture to a temperature between 260° and 300° C. to effectuate reduction of said metal salt solution and decomposition of said organometallic compound;
- and
- adding a flocculent to cause said magnetic alloy nanoparticles to precipitate out of said mixture without permanent agglomeration.
Dependencies are inferred from the claim text.