Topic
Metamagnetism
About: Metamagnetism is a research topic. Over the lifetime, 2023 publications have been published within this topic receiving 38108 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: A three-dimensional copper diphosphonate incorporating an organic pyrazine ligand has been hydrothermally synthesized, which exhibits antiferromagnetic ordering below 4.2 K and metamagnetic behavior as mentioned in this paper.
82 citations
TL;DR: In this paper, measurements of the anisotropic magnetization and magnetoresistance on single crystals of EuFe2As2, a parent compound of ferro-arsenide high-temperature superconductor, were reported.
Abstract: We report the measurements of the anisotropic magnetization and magnetoresistance (MR) on single crystals of EuFe2As2, a parent compound of ferro-arsenide high-temperature superconductor. Apart from the antiferromagnetic (AFM) spin density wave (SDW) transition at 186 K associated with Fe moments, the compound undergoes another magnetic phase transition at 19 K due to AFM ordering of Eu2+ spins (J=S=7/2). The latter AFM state exhibits metamagnetic (MM) transition under magnetic fields. Upon applying magnetic field with H∥c at 2 K, the magnetization increases linearly to 7.0 μB f.u.−1 at μ0H=1.7 T and then remains at this value for saturated Eu2+ moments under higher fields. In the case of H∥ab, the magnetization increases step-like to 6.6 μB f.u.−1 with small magnetic hysteresis. An MM phase was identified with the saturated moments of 4.4 μB f.u.−1. The MM transition accompanies negative in-plane MR, reflecting the influence of Eu2+ moments ordering on the electrical conduction of FeAs layers. These results were explained in terms of spin-reorientation and spin-reversal based on an A-type AFM structure for Eu2+ spins. The magnetic phase diagram has been established.
81 citations
TL;DR: It was demonstrated that the triple bridges mediate ferromagnetic coupling and that the compound represents a new example of the rare systems exhibiting the coexistence of antiferromagnetic ordering, metamagnetism, and slow magnetic dynamics.
Abstract: Two coordination polymers formulated as [{[Co2(L)(N3)4]·2DMF}n (1) and [Mn2(L)(H2O)0.5(N3)8]n (2) (L = 1,4-bis(4-carboxylatopyridinium-1-methyl)benzene) were synthesized and structurally and magnetically characterized. In compound 1, the anionic uniform Co(II) chains with mixed (μ-EO-N3)2(μ-COO) triple bridges (EO = end-on) are cross-linked by the cationic bis(pyridinium) spacers to generate 2D coordination layers. It was demonstrated that the triple bridges mediate ferromagnetic coupling and that the compound represents a new example of the rare systems exhibiting the coexistence of antiferromagnetic ordering, metamagnetism, and slow magnetic dynamics. Compound 2 features the magnetic Δ-chain formed from isosceles triangular units with single μ-EE-N3 and double (μ-EO-N3)(μ-COO) bridges (EE = end-to-end). The Δ-chains are interlinked by long organic ligands into a 3D framework with novel net topology and 3-fold interpenetration. The magnetic properties of 2 indicate the presence of spin frustration charac...
79 citations
TL;DR: In this paper, magnetic and differential scanning calorimetric measurements and Mossbauer examination were carried out to clarify the magnetic features of Ni50Mn36.5Fe0.557Sn13.
Abstract: Magnetic and differential scanning calorimetric measurements and Mossbauer examination were carried out to clarify the magnetic features of Ni50Mn36.5Fe0.557Sn13. The magnetic field cooling effects were observed in the thermomagnetization curves below 235K and the Curie temperature of the parent phase was near the martensitic transformation temperature. The Mossbauer spectra taken from the parent+martensite two-phase state at 312K and from the martensite single-phase state at 264K were both singlets, showing a typical paramagnetic feature. On the other hand, the Mossbauer spectra taken from the martensite phase at 199 and 80K were complicated, including some magnetic components.
79 citations
TL;DR: In this article, the authors report on peculiar metamagnetic transitions which take place in antiferromagnetic, charge and orbitally ordered manganites at very low temperatures, the virgin magnetization curves of some of these compounds exhibit several, sharp steps giving rise to a staircase-like shape.
78 citations