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Metamagnetism
About: Metamagnetism is a research topic. Over the lifetime, 2023 publications have been published within this topic receiving 38108 citations.
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TL;DR: In this article, a series of Ni43Mn46−xCuxSn11 (x=1, 2, and 3) alloys was prepared by the arc melting method.
Abstract: A series of Ni43Mn46−xCuxSn11 (x=1, 2, and 3) alloys was prepared by the arc melting method. The martensitic transition shifts to a higher temperature with increasing Cu concentration. The isothermal magnetization curves around the martensitic transition temperature show a typical metamagnetic behavior. Under a low applied magnetic field of 10kOe, positive values of magnetic entropy change around the martensitic transition temperature are 14.1, 18.0, and 15.8J∕kgK for x=1, 2, and 3, respectively. While in the vicinity of the Curie temperature of the austenitic phase, these negative values are 1.1, 1.0, and 0.9J∕kgK for x=1, 2, and 3, respectively. The origin of the large entropy changes and the potential application for Ni43Mn46−xCuxSn11 alloys as a working substance for magnetic refrigeration are discussed.
77 citations
TL;DR: In this paper, the magnetic and dielectric properties of single-domain BiFeO 3 were studied in pulsed magnetic fields up to 55 T. At low temperatures, metamagnetic transitions accompanied with sharp changes in electric polarization (P ) were observed at around 18 T. The angular dependence of the transition field coincides with that of the cycloidal state to the canted antiferromagnetic spin state studied in the framework of the Landau-Ginzburg theory incorporated with the Lifshitzlike invariant.
Abstract: Magnetic and dielectric properties of single-domain crystals of BiFeO 3 were studied in pulsed magnetic fields up to 55 T. At low temperatures, metamagnetic transitions accompanied with sharp changes in electric polarization ( P ) were observed at around 18 T. The angular dependence of the transition field coincides with that of the transition from the cycloidal state to the canted antiferromagnetic spin state studied in the framework of the Landau–Ginzburg theory incorporated with the Lifshitz-like invariant. The parasitic P component caused by the cycloidal spin structure amounts to 210±30 µC/m 2 in terms of the projected component on the pseudocubic principal axis, which can be controlled by applying magnetic fields at least up to 500 K. This result indicates that the microscopic magnetoelectric coupling in BiFeO 3 is not weak: In fact, it is rather strong as compared to that in the canonical multiferroic material TbMnO 3 .
76 citations
18 May 1999
TL;DR: The effect of substitution by other magnetic elements on the Curie temperature was examined in this article, where the authors showed that the itinerant electron metamagnetic transition appears above T/sub c/ for y = 0.03 and 0.04.
Abstract: Ferromagnetic La(Fe/sub x/Si/sub 1-x/)/sub 13/ compounds with x/spl ges/0.87 show an itinerant metamagnetic transition above the Curie temperature T/sub c/. Since a large volume change of about 1.5% is caused by the transition, the present compounds have a possibility for practical applications as giant magnetostrictive materials. To adjust T/sub c/ around room temperature, the effect of the substitution by other magnetic elements on the Curie temperature was examined. The Curie temperature of La(Fe/sub 0.88/Co/sub y/Si/sub 0.12-y/)/sub 13/ compounds increases with increasing y and the itinerant electron metamagnetic transition appears above T/sub c/. For y=0.03 and 0.04, a huge volume change of 0.6/spl sim/0.9%, or a linear change of 0.2/spl sim/0.3%, due to the itinerant metamagnetic transition is observed around 250 K.
75 citations
TL;DR: Magnetization measurements on the itinerant electron magnet Y(Co1−xAlx)2 up to 350 kOe have clearly revealed metamagnetic transitions in the paramagnetic region as discussed by the authors.
75 citations
TL;DR: In this paper, the authors investigated the metamagnetic anomaly observed in several heavy-fermion compounds, and found that MA is closely related to a sharp peak in the density of states of the hybridized quasiparticle bands.
75 citations