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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, the Coulomb Hubbard interaction U applied to the Ru 4d states has dramatic effects on the Fermi surface, revealing the role of Coulomb interactions and correlated many-body physics.
Abstract: We report electronic band structure calculations for Sr$_{4}$Ru$_{3}$O$_{10}$ that displays both ferromagnetic and metamagnetic behavior. The density functional calculations find the ground state to be ferromagnetic in agreement with the experiment and we find that the inclusion of Coulomb Hubbard interaction U applied to the Ru 4d states has dramatic effects on the Fermi surface, which reveal the role of Coulomb interactions and correlated many-body physics. The minority spin bands are mainly empty with Fermi surfaces in the outer areas of the Brillouin zone away from the $\Gamma$ point with bands that disperse steeply upward. The majority spin bands are full or nearly fully occupied and form narrow bands near the Fermi energy around the $\Gamma$ point, which could be the electronic origin of the metamagnetism. The results are in qualitative agreement with recent angle resolved photoemission spectroscopy (ARPES) experiments and show the need for a combined theoretical study and experimental ARPES investigation with better energy resolution to reveal the nature of the narrow bands close to the Fermi-level, which is critical for understanding the exotic magnetic properties observed in this material.

3 citations

Journal ArticleDOI
TL;DR: In this article , a mixture of MnCoSi-based powders and epoxy under a magnetic field is reported to enhance the strength and maintain good magnetostrictive property, which is comparable to that of Terfenol-D and Fe-Ga alloys.

3 citations

Journal ArticleDOI
TL;DR: In this paper, the magnetic phase transitions of pseudo-binary rare earth (R) Laves phases R1−xYxCo2 have been investigated by perturbed angular correlation (PAC) measurements of the magnetic hyperfine fields at the probe nucleus 111Cd for R = Tb, Sm and Ho at various Y concentrations x and for r = Gd, Dy, Er, Nd and Pr at the concentration x = 0.3.
Abstract: The magnetic phase transitions of pseudo-binary rare earth (R) Laves phases R1−xYxCo2 have been investigated by perturbed angular correlation (PAC) measurements of the magnetic hyperfine fields at the probe nucleus 111Cd for R = Tb, Sm and Ho at various Y concentrations x and for R = Gd, Dy, Er, Nd and Pr at the concentration x = 0.3. First-order transitions were observed in Tb1−xYxCo2 and Sm1−xYxCo2 for x≥0.3, in Ho1−xYxCo2 for x≤0.4 and in R0.7Y0.3Co2 for R = Dy, Ho, Er, Nd and Pr. For Gd0.7Y0.3Co2, the temperature dependence of the average magnetic hyperfine field is compatible with a second-order transition. The discontinuity of the magnetic hyperfine interaction at the first-order transitions of heavy R1−xYxCo2, which mainly reflects the jump of 3d magnetization of the Co subsystem at TC, was found to increase monotonically with decreasing order temperature. The TC dependence of the normalized magnetic frequency with T0 = 203(5) K for the boundary temperature between first- and second-order transitions can be explained by the temperature dependence of the coefficient of the M4 term of the free energy in the Wohlfarth–Rhodes–Shimizu theory of itinerant electron metamagnetism.

3 citations

Journal ArticleDOI
TL;DR: In this paper, the magnetic field-induced valence transition in rare-earth compound has been examined based on a pseudospin S=1 Ising model proposed earlier for valence transposition.

3 citations

Journal ArticleDOI
TL;DR: In this paper, a magnetic phase diagram is obtained with the parameters estimated from the observed magnetization curves under high pressures, and the P -dependences of the characteristic temperatures T 0 and T max, where the metamagnetic transition disappears and the susceptibility reaches a maximum, are estimated and compared with the observed results.

3 citations

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