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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 first single-crystal study of Fe and Ni doped UCoAl and UCo0.95Ni0.05Al was performed in the presence of magnetic correlations or spin fluctuations in the paramagnetic compounds.
Abstract: We present the first single-crystal study of Fe and Ni doped U(Co1-x
T
x
)Al compounds in comparison to the parent compound, the itinerant 5f-electron metamagnet UCoAl. Magnetization and specific-heat data measured in the temperature range of (1.8-300) K and in fields up to 10 T are analyzed and discussed. Both compounds exhibit a strong uniaxial anisotropy with the dominating magnetic response along the c-axis of the hexagonal ZrNiAl-type structure. Ni substitution yields an increase of the critical field for metamagnetism; UCo0.95Fe0.05Al is ferromagnetic below 30 K. Temperature evolution of the entropy change between 0 and 10 T points to involvement of magnetic correlations or spin fluctuations in the paramagnetic compounds UCoAl and UCo0.95Ni0.05Al.
TL;DR: In this article, the authors show that the itinerant electron metamagnetic transition is induced when the effective field acting on the Co, which is the sum of the applied and the exchange fields, attains the critical value.
Abstract: In Y 1−x Zr x Co 3 (0⩽x⩽0.1) the high field magnetization was observed in pulsed fields up to 40 T at 4.2 K, and the transition fields for the itinerant electron metamagnetism were determined in pulsed fields up to 100 T at 10 K. The results show that the itinerant electron metamagnetic transition is induced when the effective field acting on the Co, which is the sum of the applied and the exchange fields, attains the critical value.
TL;DR: In this paper, the authors measured AC susceptibility and high field magnetization on oriented powder samples of Y1−xNdxCo3 and showed that the samples exhibit spontaneous and field-induced spin-reorientation transitions, together with two metamagnetic transitions of the Co sublattice.
TL;DR: In this article, a superexchange mechanism for polycrystalline R 2 Ba 2 CuPtO 8 (R =Ho, Er, Tm, Yb, Lu and Y) oxides has been proposed in which the Cu 2+ sublattice plays an important role as promoter of the antiferromagnetic interactions of ferromagnetic R 3+ coupled in the a-c plane of the structure.
TL;DR: Substitution of Y for U in the itinerant 5f-electron metamagnet UCoAl transforms the system to a ferromagnetic ground state as discussed by the authors.However, the metamagnetic transition becomes of the second-order type instead of the first-order one for the parent U CoAl.
Abstract: Substitution of Y for U in the itinerant 5f-electron metamagnet UCoAl transforms the system to a ferromagnetic ground state. Application of external hydrostatic pressure above 0.3 GPa suppresses the ferromagnetism and restores the “UCoAl-type” metamagnetism. However, the metamagnetic transition becomes of the second-order type instead of the first-order one for the parent UCoAl.