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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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Journal ArticleDOI
TL;DR: In this article, a first order phase transition induced by magnetic field H 0 (// a )∼67 kOe has been found, and it is concluded that this phase transition is a metamagnetic transition at which ths weak ferromagnetic moment of the rare-earth spins reverses its coupling with the magnetic moment of Yb 3+ spins from antiparallel to parallel.
Abstract: R exciton lines of YbCrO 3 corresponding to the 4 A 2 g → 2 E g transition of Cr 3+ have been measured at 4.2 K, where a first order phase transition induced by magnetic field H 0 (// a )∼67 kOe has been found. We concluded that this phase transition is a metamagnetic transition at which ths weak ferromagnetic moment of the Cr 3+ spins reverses its coupling with the magnetic moment of the Yb 3+ spins from antiparallel to parallel. By the analysis of the spectral changes in the metamagnetic transition, the molecular field upon the Cr 3+ ion due to the Cr–Yb magnetic interaction was estimated. Generally, if the mnagnetic moment of the rare-earth spins couples antiparallel to the weak ferromagnetic moment of the transition-metal spins for other orthochromites and orthoferrites, the metamagnetic transition of this type will be expected.

13 citations

Journal ArticleDOI
H. Yamada1
TL;DR: In this paper, the temperature and pressure dependencies of a metamagnetic transition in an isotropic itinerant-electron system are discussed in terms of a spin fluctuation model based on the Ginzburg-Landau theory, including magnetoelastic energy.
Abstract: Temperature and pressure dependencies of a metamagnetic transition (MT) in an isotropic itinerant-electron system are discussed in terms of a spin fluctuation model based on the Ginzburg–Landau theory, including magnetoelastic energy. It has been shown that the critical magnetic field B C of the MT increases as temperature T and pressure P increase. Both first- and second-order transitions of the magnetization at the Curie temperature T C are derived, depending on the characteristic quantity q ( 0 ) of the MT given by Landau parameters. It has been obtained that the T C of the first-order transition is proportional to ( P C - P ) 1 / 2 near the critical pressure P C , as has been observed in MnSi and La(Fe,Si)13. By the numerical calculations, a three-dimensional (P, T, B) magnetic phase diagram is obtained.

13 citations

Journal ArticleDOI
TL;DR: In this article, the antiferromagnetic compound UNiGa was measured at 4.2 K on a single crystal in a magnetic field applied along the c axis, with negligible volume effect owing to cancellation of the linear strains.

13 citations

Journal ArticleDOI
TL;DR: In this article, the magnetic properties observed in Y-M (Mn, Fe, Co, and Ni) and Y 2 M 14 B (MFe and Co) intermetallic compounds are reviewed from a viewpoint of the itinerant electron model.
Abstract: Various magnetic properties observed in Y-M (M=Mn, Fe, Co, and Ni) and Y 2 M 14 B (MFe and Co) intermetallic compounds are reviewed from a viewpoint of the itinerant electron model. The characteristics of the electronic density of states calculated for these compounds are summarised. It is shown that the general trend of the magnetism of these compounds can be explained in terms of the calculated results of the density of states. The calculated values of the low-temperature specific heat coefficient and the local magnetic moments show good agreement with the experimental ones, which confirms the validity of the explanation of their magnetism in terms of the itinerant electron model. Explanations are given for the large magnetovolume effect in Fe-rich YFe compounds, the metamagnetism of Y 2 Ni 16 , the thermal spontaneous ferromagnetism of Y 2 Ni 7 and the weak ferromagnetism of Y 9 Co 7 .

13 citations

Journal ArticleDOI
TL;DR: In this article, an isothermal magnetic entropy change for 3D transition metal compounds is discussed based on the theory of the itinerant-electron metamagnetism, which depends not only on the magnetization jump at the Curie temperature, but also on the temperature dependence of the critical field of the metamagnetic transition.
Abstract: Based on the theory of the itinerant-electron metamagnetism, an isothermal magnetic entropy change is discussed for 3d transition metal compounds. The magnetic entropy change depends not only on the magnetization jump at the Curie temperature, but also on the temperature dependence of the critical field of the metamagnetic transition. The isothermal magnetic entropy changes for Co(S,Se) 2 , Lu(Co,Al) 2 and Lu(Co,Ga) 2 are estimated and compared with those observed for MnFe(P,As) and La(Fe,Si) 13 .

13 citations

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