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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 spin system is highly anisotropic and the transition is not found along the a -axis, the results are explained by introducing the incommensurate mean field model.
16 citations
TL;DR: In this article, a systematic diluting experiment has been performed with the single crystals of pseudo-ternary alloys Ce 1-x (La 0.63 Y 0.37 ) x Ru 2 Si 2 [0≤ x ≤ 1], where the unit cell volume is kept unchanged to avoid the chemical pressure effect.
Abstract: In order to study the single-site and inter-site effects in CeRu 2 Si 2 , a systematic diluting experiment has been performed with the single crystals of pseudo-ternary alloys Ce 1- x (La 0.63 Y 0.37 ) x Ru 2 Si 2 [0≤ x ≤1], where the unit cell volume is kept unchanged to avoid the chemical pressure effect. Magnetization process in fields H ≤200 kOe and at applied pressures P ≤5 kbar, specific heat C ( T ), electrical resistivity ρ( T ) and thermal expansion have been measured at temperatures above 1.5 K, with a special attention being paid to the metamagnetic behavior inherent in CeRu 2 Si 2 . In a whole Ce concentration range, the system remains in a non-magnetic state. Sharp metamagnetism shows a rapid broadening with x , and disappears at x ∼0.2 where incoherent Kondo scattering becomes significant in ρ( T ). By careful analysis of single-site contributions, a peak structure is revealed in C ( T ) which is not explained by the “Kondo peak” alone. The result can be interpreted by a pseudo-gap in the qu...
16 citations
TL;DR: In this paper, the magnetic phase transition of Ho3Co compound was investigated and the maximal value of magnetic entropy change (ΔSM) was found to be −14.5 J/kg with a refrigerant capacity (RC) value of 440 J/ kg around Neel temperature.
Abstract: Magnetocaloric effect (MCE) and magnetic phase transition of Ho3Co compound have been investigated. The two successive magnetic transitions: spin–reorientation transition at TSR = 8.5 K and antiferromagnetic (AFM)–paramagnetic transition at the Neel temperature TN = 21 K are observed. The Ho3Co compound undergoes a field-induced metamagnetic transition from AFM to ferromagnetic states below TN, which leads to a large MCE. The maximal value of magnetic entropy change (ΔSM) is found to be −14.5 J/kg K with a refrigerant capacity (RC) value of 440 J/kg around TN for a field change of 0–5 T. The large ΔSM as well as considerable RC in Ho3Co is very useful for applying it to the magnetic refrigeration in low-temperature ranges.
16 citations
TL;DR: In this paper, the magnetic phase transition and the magnetoresistance in bulk intermetallic PrGa compound were investigated experimentally, and it was found that the compound exhibits a field-induced metamagnetic transition from AFM to FM state and a considerable change in lattice constants in a temperature range of 28-36 K.
Abstract: The magnetic phase transition and the magnetoresistance (MR) in bulk intermetallic PrGa compound are investigated experimentally. Two successive magnetic transitions, ferromagnetic (FM)-antiferromagnetic (AFM) transition and AFM-paramagnetic transition, are observed at T1 = 28 K and T2 = 36 K, respectively. It is found that the PrGa compound exhibits a field-induced metamagnetic transition from AFM to FM state and a considerable change in lattice constants in a temperature range of 28-36 K. Accompanied with the AFM-FM transition, a negative MR occurs, and the maximal MR values are ∼30% and ∼34% at 28 K under the fields of 1 T and 5 T, respectively.
16 citations
TL;DR: In this article, a neutron diffraction study of the magnetic structure of the tetragonal intermetallic (EuNiGe) material was performed on a single crystalline sample and it was shown that the low-temperature phase presents a spiral moment arrangement with wave vector.
Abstract: We present here a neutron diffraction study, both in zero field and as a function of magnetic field, of the magnetic structure of the tetragonal intermetallic ${\mathrm{EuNiGe}}_{3}$ on a single crystalline sample This material is known to undergo a cascade of transitions, first at 132 K towards an incommensurate modulated magnetic structure, then at 105 K to an antiferromagnetic structure We show here that the low-temperature phase presents a spiral moment arrangement with wave vector $\mathbit{k}=(\frac{1}{4},\ensuremath{\delta},0)$ For a magnetic field applied along the tetragonal $c$ axis, the square root of the scattering intensity of the (1 0 1) reflection matches very well the complex metamagnetic behavior of the magnetization along $c$ measured previously For the magnetic field applied along the $b$ axis, two magnetic transitions are observed below the transition to a fully polarized state
16 citations