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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: Mn2Sb is a ferrimagnet, and substitution of Co or Cr for Mn above the critical concentration results in the appearance of a spontaneous first-order magnetic phase transition from ferrimagnetic (FRI) to antiferromagnetic (AF) with decreasing temperature below Tt.
Abstract: Mn2Sb is a ferrimagnet, and substitution of Co or Cr for Mn above the critical concentration results in the appearance of a spontaneous first-order magnetic phase transition from ferrimagnetic (FRI) to antiferromagnetic (AF) with decreasing temperature below Tt . At T

29 citations

Book ChapterDOI
TL;DR: In this paper, the formation of 3D-moments and spin fluctuations in some rare-earth-cobalt compounds are discussed and the effects of spin fluctuations on the magnetic behavior, heat capacity, and magnetoresistance are also reviewed.
Abstract: Publisher Summary This chapter discusses the formation of 3D-moments and spin fluctuations in some rare-earth-cobalt compounds. In combination with large magnetovolume effects, these compounds exhibit a number of characteristic properties that make them suitable for checking various physical theories. The chapter focuses on Co-based Laves phase compounds and describes the itinerant-electron metamagnetism (IEMM) in various materials. The chapter discusses the magnetic properties of the systems consisting of both itinerant electrons and localized spins are formulated based on the s–d model. The effects of spin fluctuations on the magnetic behavior, heat capacity, and magnetoresistance are also reviewed in the chapter. The 4f–3d exchange interaction and its effect on the induced Co-metamagnetic behavior is presented for the magnetic rare-earth-Co 2 compounds. The role of the magnetic R-atom and the influence of the 3d electrons affecting the character of the magnetic phase transitions and spin fluctuation scattering are discussed.

29 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the charge channel in the vicinity of (meta)magnetic transitions of itinerant electron systems and showed that in a one-band Hubbard model near the van Hove filling and dominant ferromagnetic fluctuations, it is difficult to account for a microscopic mechanism for a $d$-wave Pomeranchuk deformation of the Fermi surface.
Abstract: We investigate instabilities in the charge channel in the vicinity of (meta)magnetic transitions of itinerant electron systems. Based on a weak-coupling analysis we argue that in a one-band $t\text{\ensuremath{-}}{t}^{\ensuremath{'}}$ Hubbard model near the van Hove filling and dominant ferromagnetic fluctuations it is difficult to account for a microscopic mechanism for a $d$-wave Pomeranchuk deformation of the Fermi surface. A similar deformation has been considered for the metamagnetic transition in ${\mathrm{Sr}}_{3}{\mathrm{Ru}}_{2}{\mathrm{O}}_{7}$. As an alternative we discuss the possibility of charge inhomogeneity on the nanoscale. This extends the analogy of the metamagnetic transition to a liquid-gas transition.

29 citations

Journal ArticleDOI
TL;DR: In this paper, the authors studied the origin of the cooperative Jahn-Teller effect and the metamagnetic transition in the orthorhombic compound PrCu 2, and determined the anisotropic ferroquadrupole phase diagram by measuring the specific heat and thermal expansion under magnetic fields.
Abstract: We have studied the origin of the cooperative Jahn-Teller effect and the metamagnetic transition in the orthorhombic compound PrCu 2 . We have determined the anisotropic ferroquadrupole phase diagram by measuring the specific heat and thermal expansion under magnetic fields. With increasing the field, the Jahn-Teller transition temperature increases slightly for the field along a - and c -axes, while it decreases intensively along the b -axis. The phase diagram can be explained quantitatively by including the quadrupolar interaction of - K JT O x y in the crystalline electric field and Zeeman Hamiltonian. The metamagnetic transition, which brings about the conversion between the easy ( a )- and hard ( c )-axes magnetization, has been also studied through the magnetostriction. This phenomenon is also explained quantitatively on the basis of the quadrupolar interaction of - K M O 2 2 . The sign of is found to be negative in the state where the c -axis is the hard one, while it ...

29 citations

Journal ArticleDOI
TL;DR: The effect of Ge substitution on the magnetic, magnetocaloric and exchange bias properties of Heusler alloy system Ni50Mn36Sn14-xGex (x = 1, 2) has been investigated in this paper.
Abstract: The effect of Ge substitution on the magnetic, magnetocaloric, and exchange bias properties of Heusler alloy system Ni50Mn36Sn14-xGex (x = 1, 2) has been investigated. With the increase of Ge content, the cell volume decreases due to the smaller Ge radius and the martensitic transition temperature increases, while the Curie temperature of the austenite phase shows a small decrease. Metamagnetic behavior is observed in the low temperature magnetization isotherms for x = 1, whereas it is less pronounced in x = 2. The maximum magnetic entropy changes associated with the martensitic transition are 7.8 J/kg K and 2.3 J/kg K for x = 1 and 2, respectively, for a field change of 5 T. Relative cooling power is found to be more in the vicinity of the Curie temperature of the austenite phase, compared to that at the martensitic transition temperature in both x = 1 and 2. At low temperatures, both the samples exhibit exchange bias effect, with x = 2 showing higher value of exchange bias field. This is ascribed to the...

29 citations

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