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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 paper, the magnetic field dependence of the specific heat was examined for a simple ferromagnet and showed that the electronic specific heat coefficient is larger in the F state than in the AF state.
Abstract: The magnetic field dependence of the specific heat was examined for and . The former compound is a simple ferromagnet, while the latter shows an antiferromagnetic-to-ferromagnetic (AF-to-F) transition with increasing temperature and undergoes a metamagnetic transition at around 6 T at low temperatures. The results indicate that the electronic specific heat coefficient, , is larger in the F state than in the AF state. These results suggest the importance of the electronic specific heat as regards the entropy change associated with the AF-to-F transition. In the F state, a decrease of with increasing field was observed for as well as for . The origin of this behaviour is also discussed.

6 citations

Journal ArticleDOI
TL;DR: In this article, a magnetic phase diagram is made based on the magnetic measurement, and a phenomenological model is proposed to explain the peculiar diagram, based on a combination of itinerant electronic metamagnetism and the theory for thermal activation.
Abstract: Antiferromagnetic (AFM) state with the Neel temperature around 190K is observed in NaZn13-type Pr0.2La0.8Fe11.4Al1.6 compound, similar to that in LaFe11.4Al1.6. After a zero-field-cooling process, a ferromagnetic (FM) state is induced at ∼70K by applying a magnetic field no less than 0.4T for Pr0.2La0.8Fe11.4Al1.6. The AFM-to-FM transition is irreversible at low temperature, but reversible at high temperature. A partial reversible behavior is found at temperature ranging from 70to85K. A magnetic phase diagram is made based on the magnetic measurement. To explain the peculiar diagram, a phenomenological model is proposed. The model is based on a combination of itinerant electronic metamagnetism and the theory for thermal activation.

6 citations

Journal ArticleDOI
TL;DR: In this paper, a formalism was developed to solve the multicomponent Falicov-Kimball model with dynamical mean-field theory, allowing for all possible crystal-field couplings (including spin-orbit coupling).
Abstract: We develop a formalism to solve the multicomponent Falicov-Kimball model with dynamical mean-field theory, allowing for all possible crystal-field couplings (including spin-orbit coupling). We apply these techniques to solve models of the intermediate-valence transition [as seen in YbInCu 4 and EuNi 2 (Si 1-x Ge x ) 2 ] in the simple limit of no crystal field or spin-orbit coupling. We show results for the uniform spin susceptibility, the average localized electron concentration, and transport properties. We also investigate the metamagnetic transition.

6 citations

Journal ArticleDOI
TL;DR: In this article, the metamagnetic transition and paramagnetic susceptibility for the pseudo-binary compound (Y, Lu, Co, Al) with the cubic Laves-phase structure are measured.
Abstract: The metamagnetic transition and paramagnetic susceptibility for the pseudo-binary compound (Y, Lu)(Co, Al), with the cubic Laves-phase structure are measured. The observed results are analysed on the basis of phenomenological spin-fluctuation theory for itinerant-electron metamagnetism. A satisfactory agreement between experiment and theory is obtained qualitatively.

6 citations

Journal ArticleDOI
TL;DR: In this paper, the magnetic properties of YMn6sn5.65In0.35 have been studied by X-ray diffraction, AC-susceptibility, high-field-magnetisation and magnetoresistivity measurements.
Abstract: Single crystals of YMn6Sn5.65In0.35, grown through a flux method, have been studied by X-ray diffraction, AC-susceptibility, high-field-magnetisation and magnetoresistivity (MR) measurements. The magnetic measurements, in particular, have been performed with the magnetic field applied along both crystallographic directions. The system undergoes a ferromagnetic transition at 303 K and, when the magnetic field is applied along the a -axis, also an antiferromagnetic to ferromagnetic transition is evident in the AC-susceptibility data. Magnetisation data obtained at different temperatures with the magnetic field applied along the a -axis display a metamagnetic field-induced transition from an antiferromagnetic state to a ferromagnetic state. When the magnetic field is applied along the c -axis, a field-induced transition is observed whose transition field is a function of temperature. The MR data in the longitudinal configuration with the magnetic field applied along the a -axis, are consistent with the magnetic behaviour observed through magnetisation measurements but, nevertheless, the absolute values of the MR are lower than those obtained in polycrystalline samples. This observation suggests a stronger contribution to the MR arising from the Mn interplane correlations along the c -axis.

6 citations

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202320
202249
202117
202015
201937
201837