Applied Physics Letters
Feedback | Help | Exit
Applied Physics Letters
   
 
 
 
Previous Article
Gain and noise bandwidth of NbN hot-electron bolometric mixers
We have measured the noise performance and gain bandwidth of 35 Å thin NbN hot-electron mixers integrated with spiral antennas on silicon substrate lenses at 620 GHz. The best double-sideband re...
Next Article
Spatial and temperature dependence of magnetic moment perturbations near the (1-10) Fe/Co interface
The spatial dependence of the magnetic moment perturbation near the (1-10)-Fe/Co interface was derived from hyperfine fields determined by perturbed angular correlation. The amplitude of the moment pe...

Tunable magnetic regenerator alloys with a giant magnetocaloric effect for magnetic refrigeration from ~ 20 to ~ 290 K

Appl. Phys. Lett. 70, 3299 (1997); doi:10.1063/1.119206

Issue Date: 16 June 1997

You are not logged in to this journal. Log in

V. K. Pecharsky and K. A. Gschneidner, Jr.
Ames Laboratory and Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011-3020
A giant magnetocaloric effect (Delta Smag) has been discovered in the Gd5(SixGe1 – x)4 pseudobinary alloys, where x <= 0.5. For the temperature range between ~ 50 and ~ 280 K it exceeds the reversible (with respect to alternating magnetic field) Delta Smag for any known magnetic refrigerant material at the corresponding Curie temperature by a factor of 2–10. The two most striking features of this alloy system are: (1) the first order phase transformation, which brings about the large Delta Smag in Gd5(SixGe1 – x)4, is reversible with respect to alternating magnetic field, i.e., the giant magnetocaloric effect can be utilized in an active magnetic regenerator magnetic refrigerator; and (2) the ordering temperature is tunable from ~ 30 to ~ 276 K by adjusting the Si:Ge ratio without losing the giant magnetic entropy change. ©1997 American Institute of Physics.
History: Received 25 November 1996; accepted 15 April 1997
Permalink: http://link.aip.org/link/?APPLAB/70/3299/1
BUY THIS ARTICLE   (US$28)
Download PDF (94 kB) View Cart

KEYWORDS and PACS

Keywords
PACS
  • 75.30.Sg
    Magnetic properties and materials Intrinsic properties of magnetically ordered materials Magnetocaloric effect
  • 07.20.Mc
    Instruments, apparatus, components, and techniques common to several branches of physics and astronomy Thermal instruments, apparatus, and techniques Cryogenics, refrigerators; low-temperature techniques
  • YEAR: 1996-97

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (8)
View in Separate Window/Tab
For access to fully linked references, you need to log in. For access to fully linked references, you need to Log in.
  1. V. K. Pecharsky, J. O. Moorman, and K. A. Gschneidner (unpublished).
  2. V. K. Pecharsky and K. A. Gschneidner, Jr., Adv. Cryogen. Eng. 42, 423 (1997).
  3. F. Holtzberg, R. J. Gambino, and T. R. McGuire, J. Phys. Chem. Solids 28, 2283 (1967).
  4. K. A. Gschneidner, Jr., V. K. Pecharsky, and S. K. Malik, Adv. Cryogen. Eng. 42, 475 (1997).
  5. S. M. Benford and G. V. Brown, J. Appl. Phys. 52, 2110 (1981);
    6. B. K. Ponomarev, J. Magn. Magn. Mater. 61, 129 (1986).
  6. M. P. Annaorazov, K. A. Asatryan, G. Myalikgulyev, S. A. Nikitin, A. M. Tishin, and L. A. Tyurin, Cryogenics 32, 867 (1992).
  7. M. P. Annaorazov, S. A. Nikitin, A. L. Tyurin, K. A. Asatryan, and A. Kh. Dovletov, J. Appl. Phys. 79, 1689 (1996).
  8. J. F. Herbst, C. D. Fuerst, and R. D. McMichael, J. Appl. Phys. 79, 5998 (1996).

CITING ARTICLES
For access to citing articles, you need to log in.
For access to citing articles, you need to Log in.


Copyright © American Institute of Physics