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Title: Method of making active magnetic refrigerant materials based on Gd-Si-Ge alloys

Abstract

An alloy made of heat treated material represented by Gd.sub.5(Si.sub.xGe.sub.1-x).sub.4 where 0.47.ltoreq.x.ltoreq.0.56 that exhibits a magnetic entropy change (-.DELTA.S.sub.m) of at least 16 J/kg K, a magnetostriction of at least 2000 parts per million, and a magnetoresistance of at least 5 percent at a temperature of about 300K and below, and method of heat treating the material between 800 to 1600 degrees C. for a time to this end.

Inventors:
 [1];  [2];  [1]
  1. Ames, IA
  2. (Ames, IA)
Issue Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1007930
Patent Number(s):
7114340
Application Number:
10/413,417
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02B - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Pecharsky, Alexandra O, Gschneidner, Jr., Karl A., and Pecharsky, Vitalij K. Method of making active magnetic refrigerant materials based on Gd-Si-Ge alloys. United States: N. p., 2006. Web.
Pecharsky, Alexandra O, Gschneidner, Jr., Karl A., & Pecharsky, Vitalij K. Method of making active magnetic refrigerant materials based on Gd-Si-Ge alloys. United States.
Pecharsky, Alexandra O, Gschneidner, Jr., Karl A., and Pecharsky, Vitalij K. Tue . "Method of making active magnetic refrigerant materials based on Gd-Si-Ge alloys". United States. https://www.osti.gov/servlets/purl/1007930.
@article{osti_1007930,
title = {Method of making active magnetic refrigerant materials based on Gd-Si-Ge alloys},
author = {Pecharsky, Alexandra O and Gschneidner, Jr., Karl A. and Pecharsky, Vitalij K},
abstractNote = {An alloy made of heat treated material represented by Gd.sub.5(Si.sub.xGe.sub.1-x).sub.4 where 0.47.ltoreq.x.ltoreq.0.56 that exhibits a magnetic entropy change (-.DELTA.S.sub.m) of at least 16 J/kg K, a magnetostriction of at least 2000 parts per million, and a magnetoresistance of at least 5 percent at a temperature of about 300K and below, and method of heat treating the material between 800 to 1600 degrees C. for a time to this end.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {10}
}

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Works referenced in this record:

Giant magnetoresistance in the Ge-rich magnetocaloric compound, Gd5(Si0.1Ge0.9)4
journal, December 2001


Giant Magnetocaloric Effect in Gd5(Si2Ge2)
journal, June 1997


Magnetic-field-induced structural phase transition in Gd 5 ( S i 1.8 Ge 2.2 )
journal, December 1998


Uncovering the structure–property relationships in R5(SixGe4−x) intermetallic phases
journal, October 2002


The effect of varying the crystal structure on the magnetism, electronic structure and thermodynamics in the Gd 5 (Si x Ge 1−x ) 4 system near x =0.5
journal, February 2003


Phase relationships and crystallography in the pseudobinary system Gd5Si4Gd5Ge4
journal, September 1997


Magnetic refrigeration materials (invited)
journal, April 1999


Giant magnetoresistance near the magnetostructural transition in Gd5(Si1.8Ge2.2)
journal, December 1998


Effect of alloying on the giant magnetocaloric effect of Gd5(Si2Ge2)
journal, March 1997


Hall effect in Gd 5 ( Si 1.8 Ge 2.2 )
journal, May 2000


Tunable magnetic regenerator alloys with a giant magnetocaloric effect for magnetic refrigeration from ∼20 to ∼290 K
journal, June 1997


The solubility of tantalum in eight liquid rare-earth metals
journal, February 1966