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

Pecharsky, Alexandra O; Pecharsky, Vitalij K

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

Patent · Tue Oct 03 00:00:00 EDT 2006

OSTI ID:1007930

Pecharsky, Alexandra O ^[1]; Pecharsky, Vitalij K ^[1]

Ames, IA

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.

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Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: W-7405-ENG-82

Assignee:: Iowa State University Research Foundation, Inc. (Ames, IA)

Patent Number(s):: 7,114,340

Application Number:: 10/413,417

OSTI ID:: 1007930

Country of Publication:: United States

Language:: English

References (16)

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Transformations in the Gd 5 ( S i 1.95 Ge 2.05 ) alloy induced by the temperature and magnetic-field cycling through the first-order magnetic-martensitic phase transition Levin, E. M.; Pecharsky, A. O.; Pecharsky, V. K. Physical Review B, Vol. 63, Issue 6 https://doi.org/10.1103/PhysRevB.63.064426	journal	January 2001
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 Pecharsky, V. K.; Samolyuk, G. D.; Antropov, V. P. Journal of Solid State Chemistry, Vol. 171, Issue 1-2 https://doi.org/10.1016/S0022-4596(02)00146-9	journal	February 2003
Tunable magnetic regenerator alloys with a giant magnetocaloric effect for magnetic refrigeration from ∼20 to ∼290 K Pecharsky, V. K.; Gschneidner, K. A. Applied Physics Letters, Vol. 70, Issue 24 https://doi.org/10.1063/1.119206	journal	June 1997
Giant magnetoresistance near the magnetostructural transition in Gd5(Si1.8Ge2.2) Morellon, L.; Stankiewicz, J.; Garcı́a-Landa, B. Applied Physics Letters, Vol. 73, Issue 23 https://doi.org/10.1063/1.122797	journal	December 1998
Uncovering the structure–property relationships in R5(SixGe4−x) intermetallic phases Pecharsky, Vitalij K.; Pecharsky, A. O.; Gschneidner, K. A. Journal of Alloys and Compounds, Vol. 344, Issue 1-2 https://doi.org/10.1016/S0925-8388(02)00386-9	journal	October 2002
Magnetic-field-induced structural phase transition in Gd 5 ( S i 1.8 Ge 2.2 ) Morellon, L.; Algarabel, P. A.; Ibarra, M. R. Physical Review B, Vol. 58, Issue 22 https://doi.org/10.1103/PhysRevB.58.R14721	journal	December 1998
Hall effect in Gd 5 ( Si 1.8 Ge 2.2 ) Stankiewicz, J.; Morellon, L.; Algarabel, P. A. Physical Review B, Vol. 61, Issue 19 https://doi.org/10.1103/PhysRevB.61.12651	journal	May 2000
The solubility of tantalum in eight liquid rare-earth metals Dennison, D. H.; Tschetter, M. J.; Gschneidner, K. A. Journal of the Less Common Metals, Vol. 10, Issue 2 https://doi.org/10.1016/0022-5088(66)90119-6	journal	February 1966
Magnetic-field and temperature dependencies of the electrical resistance near the magnetic and crystallographic first-order phase transition of Gd 5 ( S i 2 Ge 2 ) Levin, E. M.; Pecharsky, V. K.; Gschneidner, K. A. Physical Review B, Vol. 60, Issue 11 https://doi.org/10.1103/PhysRevB.60.7993	journal	September 1999
Effect of alloying on the giant magnetocaloric effect of Gd5(Si2Ge2) Pecharsky, V. K.; Gschneidner, K. A. Journal of Magnetism and Magnetic Materials, Vol. 167, Issue 3 https://doi.org/10.1016/S0304-8853(96)00759-7	journal	March 1997
Giant magnetoresistance in the Ge-rich magnetocaloric compound, Gd5(Si0.1Ge0.9)4 Morellon, L.; Algarabel, P. A.; Magen, C. Journal of Magnetism and Magnetic Materials, Vol. 237, Issue 2 https://doi.org/10.1016/S0304-8853(01)00506-6	journal	December 2001
Chapter 51 Phase equilibria in ternary and higher order systems with rare earth elements and silicon Rogl, Peter Handbook on the Physics and Chemistry of Rare Earths https://doi.org/10.1016/S0168-1273(84)07004-5	book	January 1984
Magnetic refrigeration materials (invited) Gschneidner, K. A.; Pecharsky, V. K. Journal of Applied Physics, Vol. 85, Issue 8 https://doi.org/10.1063/1.369979	journal	April 1999
Nature of the first-order antiferromagnetic-ferromagnetic transition in the Ge-rich magnetocaloric compounds Gd 5 ( Si x Ge 1 − x ) 4 Morellon, L.; Blasco, J.; Algarabel, P. A. Physical Review B, Vol. 62, Issue 2 https://doi.org/10.1103/PhysRevB.62.1022	journal	July 2000
Phase relationships and crystallography in the pseudobinary system Gd5Si4Gd5Ge4 Pecharsky, V. K.; Gschneidner, K. A. Journal of Alloys and Compounds, Vol. 260, Issue 1-2 https://doi.org/10.1016/S0925-8388(97)00143-6	journal	September 1997

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