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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 SNCI Grenlble results have been used to analyze the effect of the crystalline field on the properties of the spin waves of the magnetic moments.
Abstract: The magnetic phenomena are ruled by two main energy terms: the exchange energy and the magnetocrystalline anisotropy energy. According to the amplitude of the exchange interaction, with respect to the thermal energy; acclrding to the relative importance of the terms of exchange energy, magnetocrystalline energy and of coupling energy of the moments with the applied field, the magnetic moments can adopt different relative orientations. High magnetic fields produce on some substances transitions from an antiferromagnetic to a ferromagnetic state, which we call metamagnetism [1]; numerous examples exist [2], particularly with the rare earth elements and compounds [3][4][5]. On substances with high anisltropy, high magnetic fields allow to precise some specific properties, such as the anisotropy of the magnetic moment [6], the quenching of the moment due to the crystalline field [7]. On the other hand, the analysis of the isotherms of the magnetizatiln with high magnetic fields alllw to interpret interesting properties of itinerant magnetism and enhanced magnetism [8] [9]. In the present article, I discuss two original results that we have obtained recently at the SNCI Grenlble: the first lne deals with the saturatiln of paramagnetism and the effect of the crystalline field, the second one concerns the properties of the spin waves.
8 citations
TL;DR: The concept of heavy quasiparticles in the Kondo-lattice limit of the periodic Anderson model leads in a natural manner to the spin-split effective masses and metamagnetism as mentioned in this paper.
Abstract: The concept of heavy quasiparticles in the Kondo-lattice limit of the periodic Anderson model leads in a natural manner to the spin-split effective masses and metamagnetism. The spin-minority electrons become very heavy, whereas the spin-majority particles approach the band limit as the system reaches magnetic saturation.
8 citations
TL;DR: In this paper, the authors investigated the magnetization process of the intermetallic compound Fe 2 x Mn x As under a high magnetic field up to 560 kOe with a special interest in the metamagnetic behaviors both in the antiferromagnetic and ferrimagnetic states.
Abstract: Magnetization process of the intermetallic compound Fe 2- x Mn x As is investigated under a high magnetic field up to 560 kOe with a special interest in the metamagnetic behaviors both in the antiferromagnetic and ferrimagnetic states. Two kinds of stepwise transitions are found and the observed field-induced transitions are attributed to the step magnetizations of the site-I moment where two kinds of magnetic instabilities appear under a high magnetic field. The moment increases of Fe and Mn spins of two metamagnetic states are quantitatively determined.
8 citations
TL;DR: In this paper, the magnetic properties of the cobalt molybdenum η-carbide-type compounds Co 3 Mo 3 C and Co 3Mo 3 N were investigated and the absence of a magnetic long-range order was confirmed.
Abstract: We report the magnetic properties of the cobalt molybdenum η-carbide-type compounds Co 3 Mo 3 C and Co 3 Mo 3 N. The magnetic susceptibility χ of Co 3 Mo 3 C shows a Curie–Weiss temperature dependence at high temperatures and a broad maximum at around 100 K, whereas that of Co 3 Mo 3 N shows a nearly temperature-independent enhanced Pauli paramagnetic behavior. The absence of a magnetic long-range order was confirmed by the nuclear magnetic resonance technique in both the compounds. As expected from the broad maximum of χ, we observed an itinerant electron metamagnetic transition at around 37 T in Co 3 Mo 3 C.
8 citations
TL;DR: In this article, a uniaxial pressure study on the magnetisation of single crystals of the bilayer perovskite Sr3Ru2O7, a metamagnet close to a ferromagnetic instability, was conducted.
Abstract: We report a uniaxial‐pressure study on the magnetisation of single crystals of the bilayer perovskite Sr3Ru2O7, a metamagnet close to a ferromagnetic instability. We observed that the application of a uniaxial pressure parallel to the c‐axis induces ferromagnetic ordering with a Curie temperature of about 80 K and critical pressures of about 4 kbar or higher. This value for the critical pressure is even higher than the value previously reported (∼ 1 kbar), which might be attributed to the difference of the impurity level. Below the critical pressure parallel to the c‐axis, the metamagnetic field appears to hardly change. We have also found that uniaxial pressures perpendicular to the c‐axis, in contrast, do not induce ferromagnetism, but shift the metamagnetic field to higher fields.
8 citations