Giant reversible magnetocaloric effect in antiferromagnetic GdCo2B2 compound

Lingwei Li; Nishimura, Katsuhiko; Yamane, Hiromitsu
March 2009
Applied Physics Letters;3/9/2009, Vol. 94 Issue 10, pN.PAG
Academic Journal
The magnetocaloric effect of GdCo2B2 was studied by magnetization and heat capacity measurements. A giant reversible magnetocaloric effect has been observed which is related to a field-induced first order metamagnetic transition from antiferromagnetic to ferromagnetic state. The values of maximum magnetic entropy change (-ΔSMmax) reach 9.3 and 21.5 J kg-1 K-1 for the field change of 2 and 7 T with no obvious hysteresis loss around 25 K, respectively. The corresponding maximum adiabatic temperature changes (ΔTadmax) are evaluated to be 6.7 and 18.9 K. These values are even larger than some of potential magnetic refrigerant materials reported in the same temperature range and also comparable to the room temperature giant magnetocaloric materials. These results indicated that GdCo2B2 could be a promising candidate for magnetic refrigeration at low temperatures.


Related Articles

  • Magnetic and calorimetric investigations of inverse magnetocaloric effect in Pr0.46Sr0.54MnO3. Naik, V. B.; Barik, S. K.; Mahendiran, R.; Raveau, B. // Applied Physics Letters;3/14/2011, Vol. 98 Issue 11, p112506 

    We investigated magnetic entropy change (ΔSm) in the A-type antiferromagnet Pr0.46Sr0.54MnO3 by magnetic and differential scanning calorimetry (DSC) methods. The field-induced antiferromagnetic to ferromagnetic transition is first-order in nature and is accompanied by a large change in the...

  • Oscillating magnetocaloric effect. Reis, M. S. // Applied Physics Letters;8/1/2011, Vol. 99 Issue 5, p052511 

    This Letter presents the oscillatory behavior found in the magnetic entropy change of diamagnetic materials. We show that this quantity depends on the oscillating term and, as a consequence, the magnetocaloric potential can be tuned as either inverse or normal, depending on the value of the...

  • Magnetic field dependence of the maximum adiabatic temperature change. Kuz'min, M. D.; Skokov, K. P.; Karpenkov, D. Yu.; Moore, J. D.; Richter, M.; Gutfleisch, O. // Applied Physics Letters;7/4/2011, Vol. 99 Issue 1, p012501 

    The field dependence of the maximum magnetocaloric ΔT-effect in ferromagnets with second-order phase transitions is studied by way of direct measurements. All studied materials are found to follow the formula ΔTmax=A(H+H0)2/3-AH02/3, where A and H0 are constants and H is the internal...

  • Entropy behavior of Er-doped YAG for application to ADRs. Kushino, Akihiro; Aoki, Yuji; Yamasaki, Noriko Y.; Ishisaki, Yoshitaka; Ohashi, Takaya; Mitsuda, Kazuhisa // AIP Conference Proceedings;2002, Vol. 605 Issue 1, p383 

    Garnets doped with rare-earth element are proposed for the coolant of adiabatic demagnetization refrigerators (ADR). We measured the specific heat and magnetization of a single crystal YAG (yttrium aluminum garnet) doped with 30% Er[sup 3+] ions for a temperature range between 93 mK and 8 K...

  • Large magnetic entropy change in Ni50Mn50-xInx Heusler alloys. Pathak, Arjun Kumar; Khan, Mahmud; Dubenko, Igor; Stadler, Shane; Ali, Naushad // Applied Physics Letters;6/25/2007, Vol. 90 Issue 26, p262504 

    The magnetocaloric properties of polycrystalline Ni50Mn50-xInx (15≤x≤16) associated with the second order magnetic transition at the Curie temperature and the first order martensitic transition were studied using magnetization measurements. The refrigeration capacity and magnetic...

  • Magnetocaloric effect. Physics and applications. SZYMCZAK, H.; SZYMCZAK, R. // Materials Science (0137-1339);2008, Vol. 26 Issue 4, p807 

    The principles of magnetic cooling and the magnetocaloric properties of various magnetic compounds have been presented with a special focus on materials with giant and colossal magnetocaloric parameters. The magnetocaloric properties of manganites and cobaltites have been considered. The maximum...

  • Magnetic entropy changes in nanogranular Fe:Ni61Cu39. Michalski, S.; Skomski, R.; Mukherjee, T.; Li, X.-Zh.; Binek, Ch.; Sellmyer, D. J. // Journal of Applied Physics;Apr2011, Vol. 109 Issue 7, p07A936 

    Artificial environment-friendly Gd-free magnetic nanostructures for magnetic cooling are investigated by temperature-dependent magnetic measurements. We consider two-phase nanocomposites where nanoclusters (Fe) are embedded in a Ni61Cu39 matrix. Several composite films are produced by cluster...

  • Procedure for numerical integration of the magnetocaloric effect. Moore, J. D.; Skokov, K. P.; Liu, J.; Gutfleisch, O. // Journal of Applied Physics;Sep2012, Vol. 112 Issue 6, p063920 

    When the magnetocaloric effect is obtained using indirect or direct techniques, the result is the isothermal entropy change ΔSiso(T,ΔH) or the adiabatic temperature change ΔTad(T,ΔH). Evaluation of the linking relation dTad=-(T/Cp)×dSiso (Cp, specific heat; T, temperature) as...

  • Some common misconceptions concerning magnetic refrigerant materials. Pecharsky, V. K.; Gschneidner, K. A. // Journal of Applied Physics;11/1/2001, Vol. 90 Issue 9, p4614 

    The relationships between both extensive and intensive properties quantifying the magnetocaloric effect, i.e., between the isothermal entropy change and the adiabatic temperature change, respectively, have been analyzed. An extensive measure of the magnetocaloric effect alone, without...


Read the Article


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

Try another library?
Sign out of this library

Other Topics