TITLE

Weak exchange effect and large refrigerant capacity in a bulk metallic glass Gd0.32Tb0.26Co0.20Al0.22

AUTHOR(S)
Yongsheng Liu; Jincang Zhang; Youquan Wang; Yanyan Zhu; Zhenglong Yang; Jing Chen; Shixun Cao
PUB. DATE
March 2009
SOURCE
Applied Physics Letters;3/16/2009, Vol. 94 Issue 11, p112507
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The magnetic behavior and refrigeration capacity of Gd0.32Tb0.26Co0.20Al0.22, a bulk metallic glass (BMG) fabricated by a copper-mold suck-casting method, are investigated. The Curie temperature increases from 79 K at 200 Oe to 95 K at 50 000 Oe. A weak exchange field of 25 T in the BMG system, caused by the strong disorder, is derived by the mean-field approximation. The maximum magnetic entropy change (8.02 J kg-1 K-1) and the refrigerant capacity (642 J kg-1) for 5 T indicate the BMG has the better refrigerant efficiency compared to known magnetic refrigerants.
ACCESSION #
43230381

 

Related Articles

  • On the Curie temperature dependency of the magnetocaloric effect. Belo, J. H.; Amaral, J. S.; Pereira, A. M.; Amaral, V. S.; Araújo, J. P. // Applied Physics Letters;6/11/2012, Vol. 100 Issue 24, p242407 

    We investigate the magnetocaloric effect dependency on the most important microscopic parameters of ferromagnetic materials, such as the Curie temperature (TC), the spin value (J), and the magnetic field change (ΔH). Second- and first-order phase transition systems are considered, using the...

  • Controllable spin-glass behavior and large magnetocaloric effect in Gd-Ni-Al bulk metallic glasses. Yuan, Fang; Du, Juan; Shen, Baolong // Applied Physics Letters;7/16/2012, Vol. 101 Issue 3, p032405 

    Glass-forming ability, spin-glass (SG) behavior, and magnetocaloric effect in Gd55NixAl45-x (x = 15, 20, 25, 30) metallic alloys were investigated. A ferromagnetic SG behavior was observed for glassy ribbons with compositions of x = 15, 20, and 25, but it disappeared for that of x = 30....

  • Enhanced refrigerant capacity and magnetic entropy flattening using a two-amorphous FeZrB(Cu) composite. Álvarez, Pablo; Sánchez Llamazares, José L.; Gorria, Pedro; Blanco, Jesús A. // Applied Physics Letters;12/5/2011, Vol. 99 Issue 23, p232501 

    The temperature dependence of the isothermal magnetic entropy change, ΔSM, and the magnetic field dependence of the refrigerant capacity, RC, have been investigated in a composite system xA + (1 - x)B, based on Fe87Zr6B6Cu1 (A) and Fe90Zr8B2 (B) amorphous ribbons. Under a magnetic field...

  • La(Fe1-xCox)11.44Al1.56: A composite system for Ericsson-cycle-based magnetic refrigerators. Gomes, A. M.; Proveti, J. R.; Takeuchi, A. Y.; Passamani, E. C.; Larica, C.; Guimarães, A. P. // Journal of Applied Physics;6/1/2006, Vol. 99 Issue 11, p116107 

    The La(Fe1-xCox)11.44Al1.56 system, with x values of 0, 0.04, 0.08, and 0.12, was investigated for its magnetocaloric potential. For selected values of Co doping, it was possible to cover a wide magnetic ordering temperature range, from 200 up to 370 K, and reduce substantially the metamagnetic...

  • Thermodynamic analysis of absorption refrigeration system based on entropy generation. Kaynakli, Omer; Yamankaradeniz, Recep // Current Science (00113891);2/25/2007, Vol. 92 Issue 4, p472 

    In this study, the first and second law thermodynamic analysis of a single-stage absorption refrigeration cycle with water/lithium bromide as working fluid pair is performed. Thermodynamic properties of each point in the cycle are calculated using related equations of state. Heat transfer rate...

  • Theorem of Ideal Cycles of Refrigerating Machines. Kolosov, M. // Chemical & Petroleum Engineering;Jan2016, Vol. 51 Issue 9/10, p674 

    A generalized expression for power is derived using as an example an arbitrary refrigerating machine capable of cooling and thermostatic control of external bodies or cooling and liquefying a through flow of gas, and the dependence of this power on external conditions, the type of problem to be...

  • Large magnetocaloric effect and enhanced magnetic refrigeration in ternary Gd-based bulk metallic glasses. Du, J.; Zheng, Q.; Li, Y. B.; Zhang, Q.; Li, D.; Zhang, Z. D. // Journal of Applied Physics;Jan2008, Vol. 103 Issue 2, p023918 

    The magnetocaloric effect and refrigeration capacity (RC) of Gd55Co20Al25 and Gd55Ni25Al20 bulk metallic glasses (BMGs) have been investigated. Large magnetic entropy changes ΔSM of 11.2 and 10.8 J kg-1 K-1 and large RC values of 846 and 920 J kg-1 are obtained for Gd55Co20Al25 and...

  • Experimental study on thermoacoustic refrigerators driven by a travelling-wave thermoacoustic engine. Luo, E.; Liu, H.; Sun, Y.; Wu, J. // AIP Conference Proceedings;2002, Vol. 613 Issue 1, p815 

    A thermoacoustic engine is a new type of pressure-wave generator that possibly has a very long lifetime because of no mechanical moving parts. A thermoacoustic engine operating in standing wave mode is also called a natural engine with intrinsic thermodynamic irreversibility, so it shows a poor...

  • Thermodynamic optimization of multi-stage cryogenic systems. Kirkconnell, C. S.; Curran, D. G. T. // AIP Conference Proceedings;2002, Vol. 613 Issue 1, p1123 

    Design point temperatures are relatively unconstrained for the wanner upper stage(s) of multi-stage cryogenic systems. For example, a sensor design in which an ambient temperature telescope is used to focus an image on an infrared focal plane army (IRFPA) might have only the operating...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics