Large reversible magnetocaloric effect caused by two successive magnetic transitions in ErGa compound

Chen, J.; Shen, B. G.; Dong, Q. Y.; Hu, F. X.; Sun, J. R.
September 2009
Applied Physics Letters;9/28/2009, Vol. 95 Issue 13, p132504
Academic Journal
Intermetallic compound ErGa exhibits two successive magnetic transitions: spin-reorientation transition at TSR=15 K and ferromagnetic-paramagnetic transition at TC=30 K. Both transitions contribute greatly to the magnetic entropy change (ΔSM), each yielding a significant peak on their ΔSM-T curve and thus a considerable value of refrigerant capacity (RC) without hysteresis loss. For a magnetic field change of 5 T, the maximal values of -ΔSM are 21.3 J/kg K at TC and 16.5 J/kg K at TSR, with an RC value of 494 J/kg. Large reversible magnetocaloric effect and RC indicate the potentiality of ErGa as a candidate magnetic refrigerant at low temperatures.


Related Articles

  • Magnetotransport And Magnetocaloric Properties Of Nanocrystalline Pr0.65(Ca0.6Sr0.4)0.35MnO3. Biswas, Anis; Samanta, Tapas; Das, I. // AIP Conference Proceedings;4/24/2008, Vol. 1003 Issue 1, p109 

    Large low field magnetoresistance has been observed in the case of sol-gel prepared nanocrystalline Pr0.65(Ca0.6Sr0.4)0.35MnO3 of average particle size ∼62 nm due to the melting of charge ordered insulating state. The system also shows large magnetocaloric effect at paramagnetic to...

  • Large internal stress-assisted twin-boundary motion in Ni2MnGa ferromagnetic shape memory alloy. Nie, Z. H.; Cong, D. Y.; Liu, D. M.; Ren, Y.; Pötschke, M.; Roth, S.; Wang, Y. D. // Applied Physics Letters;10/3/2011, Vol. 99 Issue 14, p141907 

    The twin boundary motion driven by thermo-magnetic coupling was in-situ studied in a NiMnGa single crystal using high-energy x-ray diffraction technique. An unstable martensite with an internal stress of ∼8 MPa was obtained through a thermo-magnetic training. The triple martensite variants...

  • Ferromagnetic Cluster on La2FeMnO6. Barrozo, Petrucio; Moreno, N. O.; Aguiar, J. Albino // Advanced Materials Research;2014, Vol. 975, p122 

    The structural, magnetic and electrical transport properties of La2FeMnO6 bulk samples prepared by combustion synthesis were investigated. The X-ray powder diffraction patterns with Rietveld refinement at room temperature shows that samples prepared by combustion synthesis are formed in single...

  • A search for defect related ferromagnetism in SrTiO3. Crandles, D. A.; DesRoches, B.; Razavi, F. S. // Journal of Applied Physics;Sep2010, Vol. 108 Issue 5, p053908 

    Room temperature ferromagnetic hysteresis is observed in commercial SrTiO3 substrates purchased from a variety of suppliers. It is shown that the ferromagnetic signal comes from the unpolished surfaces. Surface impurity phases cannot be detected using either x-ray diffraction or energy...

  • Physical and Magnetic Properties of NdGdNiB Compounds. Özçelik, Bekir; Nane, Onur; Kervan, Selçuk // Journal of Superconductivity & Novel Magnetism;Feb2011, Vol. 24 Issue 1/2, p763 

    We have produced NdGdNiB (0≤ x≤1.0) compounds by the arc-melting method. Physical properties of the produced samples have been investigated by means of the X-ray powder diffraction, zero field/field cooled magnetization between the temperature interval of 9-70 K, and magnetic...

  • Determination of the texturing gradient in ex situ MgB2/Fe tapes examined by x-ray diffraction and its effects on the pinning force. Senatore, Carmine; Lezza, Paola; Flükiger, René // Journal of Applied Physics;12/1/2006, Vol. 100 Issue 11, p113913 

    We found that the reduced pinning forces of ex situ MgB2/Fe monofilamentary tapes do not scale with temperature if the external magnetic field is applied parallel to the tape surface. A model is proposed to explain the behavior of the volume pinning forces in parallel and perpendicular...

  • Magnetic and Magnetocaloric Properties of Laves Phase Dy1- xGd x(Co1- xNi x)2 Solid Solutions. C`wik, J.; Palewski, T.; Nenkov, K.; Lyubina, J.; Klamut, J. // Journal of Low Temperature Physics;Apr2010, Vol. 159 Issue 1/2, p37 

    We report magnetic and magnetocaloric properties of the polycrystalline series of Dy1- xGd x(Co1- xNi x)2 ( x=0.1, 0.2, 0.3, 0.4 and 0.5) solid solutions. The samples were characterized by powder X-ray diffraction patterns taken at room temperature and revealed that all the Dy1- xGd x(Co1- xNi...

  • Comparative Study of an Alternative Magnetic Field on the Tribological Behaviour of Ferromagnetic/Ferromagnetic and Non-Ferromagnetic/Ferromagnetic Couples. Mekroud, A.; Bouchoucha, A.; Zaidi, H. // International Review of Mechanical Engineering;Mar2010, Vol. 4 Issue 3, p228 

    The thermomechanical behaviour and the characterization of two material couples ferromagnetic/ferromagnetic and non ferromagnetic/ferromagnetic in a sliding contact subjected to an alternative magnetic field were studied. By using a tribometer pin-disc, the tests in the dry friction and wear...

  • Focus Section: Magnetic ordering in relaxor ferroelectric (1 - x)Pb(Fe2/3W1/3)O3-xPbTiO3 single crystals. Li Feng; Haiyan Guo; Zuo-Guang Ye // Journal of Materials Research;Aug2007, Vol. 22 Issue 8, p8 

    Single crystals of the perovskite solid solution (1 - x)Pb(Fe2/3W1/3)O3-xPbTiO3, with x = 0, 0.07, 0.27, and 0.75, have been synthesized by the high-temperature solution growth using PbO as flux and characterized by x-ray diffraction and dielectric and magnetic measurements. The crystal...


Read the Article


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

Try another library?
Sign out of this library

Other Topics