Tunable thermal hysteresis in MnFe(P,Ge) compounds

Trung, N. T.; Ou, Z. Q.; Gortenmulder, T. J.; Tegus, O.; Buschow, K. H. J.; Brück, E.
March 2009
Applied Physics Letters;3/9/2009, Vol. 94 Issue 10, pN.PAG
Academic Journal
Structural, magnetic, and magnetocaloric properties of the MnFe(P,Ge) compounds were systematically studied on both bulk alloys and melt-spun ribbons. The experimental results show that the critical behavior of the phase transition can be controlled by changing either the compositions or the annealing conditions. The thermal hysteresis is found to be tunable. It can reach very small values, while maintaining a large magnetocaloric effect in a large range of working temperatures and under field changes that may be produced by conventional permanent magnets. Consequently, an effective way in producing ideal magnetic refrigerants for room-temperature applications is suggested.


Related Articles

  • Hysteresis and phase transitions for one-dimensional and three-dimensional models in shape memory alloys. Berti, V.; Fabrizio, M.; Grandi, D. // Journal of Mathematical Physics;Jun2010, Vol. 51 Issue 6, p062901 

    By means of the Ginzburg–Landau theory of phase transitions, we study a nonisothermal model to characterize the austenite-martensite transition in shape memory alloys. In the first part of this paper, the one-dimensional model proposed by Berti et al. [“Phase transitions in shape...

  • Influence of Be and Al on the magnetostrictive behavior of FeGa alloys. Mungsantisuk, Pinai; Corson, Robert P.; Guruswamy, Sivaraman // Journal of Applied Physics;12/15/2005, Vol. 98 Issue 12, p123907 

    The rare-earth-free body-centered-cubic FeGa-based alloys have an attractive combination of large low-field magnetostriction at room temperature, good mechanical properties, low hysteresis, and relatively low cost for use in sensor and actuator devices. This paper examines the influence of...

  • Tunable thermal hysteresis in CoGd alloys. Demirtas, S.; Camley, R. E.; Koymen, A. R. // Applied Physics Letters;11/14/2005, Vol. 87 Issue 20, p202111 

    We show that tunable magnetic thermal hysteresis can be realized for a simple ferrimagnetic CoGd alloy. The magnetization of a Co0.8Gd0.2 alloy shows a bow-tie curve as a function of temperature, which indicates supercooled and superheated phase transitions. The width of the magnetic thermal...

  • Calibration of thermal conductivity sensors with consideration of hysteresis. Feng, Man; Fredlund, Delwyn G // Canadian Geotechnical Journal;Oct2003, Vol. 40 Issue 5, p1048 

    A thermal conductivity sensor monitors soil suction by measuring the changes in thermal conductivity of the porous tip. The thermal conductivity of the porous tip is a direct function of its water content. It has long been recognized that the suction versus water content relationship of a porous...

  • A note on constrained shape memory alloys upon thermal cycling. Pan, G. H.; Huang, W. M. // Journal of Materials Science;Dec2006, Vol. 41 Issue 23, p7964 

    In this paper, we present a systematical study on the constrained shape memory alloys upon thermal cycling. The focuses are the transformation temperature interval and hysteresis. Closed-form expressions are obtained for biased actuators and thin films atop an elastic substrate.

  • Novel Amorphous Fe-Zr-Si(Cu) Boron-free Alloys. Kopcewicz, M.; Grabias, A.; Latuch, J.; Kowalczyk, M. // AIP Conference Proceedings;7/13/2010, Vol. 1258 Issue 1, p20 

    Novel amorphous Fe80(ZrxSi20-x-y)Cuy boron-free alloys, in which boron was completely replaced by silicon as a glass forming element, have been prepared in the form of ribbons by a melt quenching technique. The X-ray diffraction and Mössbauer spectroscopy measurements revealed that the...

  • Phase structure and magnetic properties of Mn3Ga2 alloy. Lu, Q. M.; Yu, F.; Yue, M.; Zhang, H. G.; Li, Y. Q.; Yan, X. L.; Liu, Y. Q.; Zhang, J. X. // Journal of Applied Physics;2014, Vol. 115 Issue 17, p17A745-1 

    In this paper, Mn3Ga2 alloys with high saturation magnetization and high Curie temperatures were prepared by levitation melting high pure Mn and Ga elements followed by annealing. The effect of annealing temperature on phase structure and magnetic properties was investigated by means of x-ray...

  • The Effect of Deformation on Microstructure of Cu-Ni-Sn Aging Alloys. Le Thi Chieu; Sai Manh Thang; Nguyen Duong Nam; Khanh, Pham Mai // Key Engineering Materials;2016, Vol. 682, p113 

    This paper presents the effect of deformation on the change of microstructure of Cu-15Ni-8Sn and Cu-9Ni-6Sn alloy during heat treatment. The samples were homogenized, quenched, cold-rolled at different thickness reduction, and aged. The effects of deformation on microstructures were observed by...

  • Saturation Magnetic Induction Prediction for Amorphous Magnetic Alloys by Using Support Vector Regression. Cai, C. Z.; Pei, J. F.; Wen, Y. F.; Zhu, X. J.; Wang, G. L.; Xiao, T. T. // Journal of Superconductivity & Novel Magnetism;Jul2010, Vol. 23 Issue 5, p741 

    This paper illustrates an application of support vector regression (SVR) approach in forecasting the saturation magnetic induction ( B s) of amorphous magnetic alloys. SVR was trained and tested with an experimental data set comprised of five input variables, comprising the average number of...


Read the Article


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

Try another library?
Sign out of this library

Other Topics