2009/02/04 by K. K. Nielsen, Zhang Lian, R. Bjoerk +11
Materials Science · Physics and Astronomy · #Condensed matter physics #Coupling (piping) #Current (fluid) #Heat transfer #Magnet #Magnetic Properties of Alloys #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetic refrigeration #Magnetization #Materials science #Mechanical engineering #Mechanics #Metallurgy #Nuclear engineering #Refrigeration #Regenerative heat exchanger #Shape Memory Alloy Transformations #Thermodynamics #Work (physics) #cond-mat.mtrl-sci #cond-mat.str-el #physics.comp-ph
paper · pdf · doi:10.1016/j.scriptamat.2012.08.036
published as Scripta Mater. (2012), except for Section III that was published in Phys. Rev. B 86, 045134 (2012) · 7 pages, 6 figures, 1 table
arxiv created 2012/05/28 · openalex publication_date 2012/09/07 · arxiv updated 2012/09/25 · openalex created_date 2017/03/16 · openalex updated_date 2026/08/05
Structural, magnetic and magnetocaloric properties of Fe2P-based Mn-Fe-P-Si compounds were investigated. The study reveals a large magneto-elastic coupling that starts to develop in the paramagnetic state and grows when the ferromagnetic transition temperature is approached. Based on the behavior of the magneto-elastic coupling, we show the thermal evolution of the magnetic moments. On cooling, magnetic moments on the tetrahedral site form and gradually increase in the paramagnetic state. At the magnetic ordering temperature the moments attain a much larger value in a discontinuous step. We also find that the hysteresis and magnetic entropy change are correlated with discontinuous changes in the lattice parameters at the transition temperature. Small hysteresis can be obtained while maintaining giant magnetocaloric effect.