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Title: Iron-based composition for magnetocaloric effect (MCE) applications and method of making a single crystal

Abstract

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 .DELTA.G.sub.m 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.degree. C./min or higher, and the melt solidifies to form a single crystal of the material.

Inventors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1241337
Patent Number(s):
9,255,343
Application Number:
13/790,560
Assignee:
UT-Battelle, LLC (Oak Ridge, TN) ORNL
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 Mar 08
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Evans, III, Boyd Mccutchen, Kisner, Roger A., Ludtka, Gail Mackiewicz, Ludtka, Gerard Michael, Melin, Alexander M., Nicholson, Donald M., Parish;, Chad M., Rios, Orlando, Sefat, Athena S., West, David L., and Wilgen, John B. Iron-based composition for magnetocaloric effect (MCE) applications and method of making a single crystal. United States: N. p., 2016. Web.
Evans, III, Boyd Mccutchen, Kisner, Roger A., Ludtka, Gail Mackiewicz, Ludtka, Gerard Michael, Melin, Alexander M., Nicholson, Donald M., Parish;, Chad M., Rios, Orlando, Sefat, Athena S., West, David L., & Wilgen, John B. Iron-based composition for magnetocaloric effect (MCE) applications and method of making a single crystal. United States.
Evans, III, Boyd Mccutchen, Kisner, Roger A., Ludtka, Gail Mackiewicz, Ludtka, Gerard Michael, Melin, Alexander M., Nicholson, Donald M., Parish;, Chad M., Rios, Orlando, Sefat, Athena S., West, David L., and Wilgen, John B. Tue . "Iron-based composition for magnetocaloric effect (MCE) applications and method of making a single crystal". United States. doi:. https://www.osti.gov/servlets/purl/1241337.
@article{osti_1241337,
title = {Iron-based composition for magnetocaloric effect (MCE) applications and method of making a single crystal},
author = {Evans, III, Boyd Mccutchen and Kisner, Roger A. and Ludtka, Gail Mackiewicz and Ludtka, Gerard Michael and Melin, Alexander M. and Nicholson, Donald M. and Parish;, Chad M. and Rios, Orlando and Sefat, Athena S. and West, David L. and Wilgen, John B.},
abstractNote = {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 .DELTA.G.sub.m 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.degree. C./min or higher, and the melt solidifies to form a single crystal of the material.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 09 00:00:00 EST 2016},
month = {Tue Feb 09 00:00:00 EST 2016}
}

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Works referenced in this record:

Using magnetic field gradients to control the directional solidification of alloys and the growth of single crystals
journal, September 2004


Magnetocaloric effect in FeCr soft magnetic nanocrystalline alloys
journal, September 2007

  • Gómez-Polo, C.; Socolovsky, L. M.; Denardin, J. C.
  • Journal of Magnetism and Magnetic Materials, Vol. 316, Issue 2, p. e876-e878
  • DOI: 10.1016/j.jmmm.2007.03.127

The use of magnetic fields in semiconductor crystal growth
journal, August 1991