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: In this article, a universal linear relation between the critical field of the metamagnetic transition, BC, and the inverse of susceptibility-maximum, χ(T max ) −1, was demonstrated.
16 citations
TL;DR: In this paper, the structural and magnetic properties of CoFe2O4 nanoparticles synthesized at different pH levels (7, 10 and 12) via co-precipitation method were studied.
Abstract: In the present manuscript, we have studied the structural and magnetic properties of CoFe2O4 nanoparticles synthesized at different pH levels (7, 10 and 12) via co-precipitation method. The structural analysis of the samples indicates the structural distortion at the octahedral site which has been found correlated with the observed roomtemperature magnetic moment of the CoFe2O4 nanoparticles. Magnetic studies reveal multiple magnetic phases and surface spin disorder in the samples. Spin canting/glass behaviour is also observed in the as-synthesized CoFe2O4 nanoparticles. In addition to these, the as-synthesized samples also show a novel metamagnetic transition due to the coexistence of antiferromagnetic and ferromagnetic ordering, simultaneously. The coexistence of antiferromagnetic and ferromagnetic phases is attributed to spin canting/surface spin disorder in the nanocrystalline samples. Mossbauer data also supports the presence of spin canting in the samples.
16 citations
TL;DR: In this article, the Gibbs-Thomson effect was used to explain the magnetic nucleation-growth behavior in thermally induced transition and those in field-induced transition, respectively.
Abstract: Macroscopic anisotropy of spatial selectivity in magnetic nucleation and growth was clarified for itinerant-electron metamagnetic transition of La(Fe0.88Si0.12)13 by the time-dependent Ginzburg-Landau model combined with the Maxwell electromagnetic equation. Spontaneous generation of voltage supports symmetric growth in the longitudinal direction of the specimen as predicted by the simulation. The difference between nucleation-growth behaviors in thermally induced transition and those in field-induced transition is also elucidated. Electrical resistivity measurements also detect anisotropic growth of the induced phase. These results imply that the magnetic-dipole version of Gibbs-Thomson effect governs growth behavior.
16 citations
TL;DR: In this paper, the metastable nature of the first order magneto-structural transition has been revealed by various sweep rate dependence of magnetization studies and the quenching of the martensitic/austenite phase with higher sweep rate has been shown by temperature/field sweep rate dependant magnetisation studies.
Abstract: The metastable nature of the first order magneto-structural transition has been revealed by various sweep rate dependence of magnetization studies. The quenching of the martensitic/austenite phase with higher sweep rate has been shown by temperature/field sweep rate dependence magnetization studies. The thermal hysteresis (magnetic hysteresis) is found to decrease with lower temperature (field) sweep rates. It is also observed that magnetization abruptly changes during the various field stops around the transition region. The growth of the magnetization during various field stops in the zero field cooled curve reveals the glassy nature of the low temperature region. All the measurements in the present case clearly show the metastable nature of the transition region.
16 citations
TL;DR: In this article, the magnetic properties of cyclotetraphosphates M2P4O12 (M = Mn, Co, Ni, and Cu) were investigated by X-ray diffraction, ESR spectroscopy, and neutron diffraction.
16 citations