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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 pressure study has been made on the metamagnetic Kondo system CeZn 2 with Neel temperature T N of 7.5 K. Measurements were carried out on the electrical resistivity and T N up to pressure p of about 30 kbar.
Abstract: A pressure study has been made on the metamagnetic Kondo system CeZn 2 with Neel temperature T N of 7.5 K. Measurements were carried out on the electrical resistivity and T N up to pressure p of about 30 kbar, and on the single crystal magnetization up to pressure of 14 kbar. Results obtained are as follows: (i) The Kondo anomaly is enhanced with application of p . (ii) T N increases with pressure first up to 15 kbar and is likely to saturate or to start decreasing around 30 kbar. (iii) Metamagnetic transition with many steps which is possibly an example of Devil's staircase character changes largely with p . Subsequently the (pressure)-(magnetic field) phase diagram is constructed. These results have been qualitatively discussed on lines described in our previous studies on CeZn 2 at normal pressure and on other Ce-based compounds.
4 citations
TL;DR: In this paper, single crystal growth and anisotropic magnetic properties of the tetragonal RAg2Ge2 (R = Pr, Nd and Sm) compounds were reported.
Abstract: We report the single crystal growth and anisotropic magnetic properties of the tetragonal RAg2Ge2 ( R = Pr , Nd and Sm) compounds which crystallize in the ThCr2Si2 -type crystal structure with the space group I4/mmm. The single crystals of RAg2Ge2 ( R = Pr , Nd and Sm) were grown by self-flux method using Ag:Ge binary alloy as flux. From the magnetic studies on single crystalline samples we have found that PrAg2Ge2 and NdAg2Ge2 order antiferromagnetically at 12 and 2 K, respectively, thus corroborating the earlier polycrystalline results. SmAg2Ge2 also orders antiferromagnetically at 9.2 K. The magnetic susceptibility and magnetization show a large anisotropy and the easy axis of magnetization for PrAg2Ge2 and NdAg2Ge2 is along the [1 0 0] direction whereas it changes to [0 0 1] direction for SmAg2Ge2. Two metamagnetic transitions were observed in NdAg2Ge2 at H m 1 = 1.25 T and H m 2 = 3.56 T for the field parallel to [1 0 0] direction whereas the magnetization along [0 0 1] direction was linear indicating the hard axis of magnetization.
4 citations
TL;DR: In this paper, the authors focused on the macroscopic and microscopic experimental works realized during a decade on the clear case of itinerant metamagnetism in the heavy fermion paramagnetic compound CeRu2Si2.
Abstract: Focus is given on the macroscopic and microscopic experimental works realized during a decade on the clear case of itinerant metamagnetism in the heavy fermion paramagnetic compound CeRu2Si2 . Emphasis is made on the feedback between the band structure, the exchange coupling and the lattice instability. Sweeps in magnetic field, pressure and temperature feel the pseudogap of this strongly correlated electronic system as well as its equivalent CeRu2Ge2 at a fictitious negative pressure. Some mysteries persist as the complete observation of the FS above the metamagnetic field HM and the detection of the dynamical ferromagnetic fluctuation near HM. The novelty of the bilayer ruthenate Sr3Ru2O7 is discussed by comparison. Despite differences in spin and electronic dimensionality many common trends emerge.
4 citations
TL;DR: In this article, the magnetoresistance ρ(H,T0) of the magnetic Kondo lattice CeAl2 at temperatures T0 in the range 0.035 − 1.3 K, well below the Neel temperature TN=3.8 K, in magnetic fields H up to 145 k0e.
4 citations