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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: The zero-field magnetic susceptibilities of Ni(NO3)22H2O, Ni( NO3)24H 2O, and Ni(No3)26H 2 O have been measured in the liquid hydrogen and liquidhelium ranges.
Abstract: The zero‐field magnetic susceptibilities of Ni(NO3)22H2O, Ni(NO3)24H2O, and Ni(NO3)26H2O have been measured in the liquid‐hydrogen and liquid‐helium ranges. The dihydrate is obtained by evaporation of a solution at 105°C.1 Its powder susceptibility has a large, sharp, peak at 4.20°K, where it reaches 0.74 cgs/mole, then drops down to 0.2 cgs/mole below 2°K. When measured along the a axis, the susceptibility of monoclinic single crystals of the dihydrate shows a similar peak. It reaches 1.5 cgs/mole, but drops to vanishing values at lower temperatures. The susceptibility in the bc plane reaches only 0.3 cgs/mole, and is nearly isotropic. It drops little below 4.20°K. This behavior is similar2‐5 to that of FeCl2 or FeCO3, and suggests the existence of two magnetic sublattices, with strong ferromagnetic interactions within each sublattice, and weaker antiferromagnetic interactions between one sublattice and the other (metamagnetism). Direct evidence for such a layer structure is also provided by a recent x‐r...
22 citations
TL;DR: In this article, the nature of multiple magnetostructural transformations in HoCo2 has been studied by employing magnetic and specific heat measurements, temperature and magnetic field dependent X-ray powder diffraction, and first-principles calculations.
Abstract: The nature of multiple magnetostructural transformations in HoCo2 has been studied by employing magnetic and specific heat measurements, temperature and magnetic field dependent X-ray powder diffraction, and first-principles calculations. Unexpected increase of magnetization observed below the spin-reorientation temperature (TSR) suggests that the low-temperature transition involves a reduction of Co moment. First principles calculations confirm that the paramagnetic cubic to ferrimagnetic tetragonal transformation at TC is assisted by itinerant electron metamagnetism, and that the reduction of Co moment in HoCo2 occurs in parallel with the ferrimagnetic tetragonal to the nearly ferromagnetic orthorhombic transformation at TSRvia the rearrangement of both 3d states of Co and 5d states of Ho. The ac magnetic susceptibility measurements show significant magnetic frustration below TC. In contrast to earlier reports neither ac nor dc magnetic susceptibilities show anomalies in the paramagnetic region obeying the Curie–Weiss law.
22 citations
TL;DR: In this article, temperature-induced itinerant-electron metamagnetism has been observed in the concentration range 0.0⩽ x ⩽ 0.4 where the Co sublattice is in the strong ferromagnetic state at low temperatures.
Abstract: X-ray thermal expansion, magnetic and electrical resistivity measurements of the pseudo-binary Ho 1− x Y x Co 3 system with PuNi 3 -type structure have been performed in a wide temperature range. Temperature-induced itinerant-electron metamagnetism has been observed in the concentration range 0.0⩽ x ⩽0.4 where the Co sublattice is in the strong ferromagnetic state at low temperatures. The transition was found to be sharper in the diluted compounds with a lower value of the transition temperature, which is in accordance with the nature of the observed effect. The temperatures of the spin-reorientation transition have been determined from low-field magnetisation measurements and the magnetic phase diagram of this system has been constructed.
22 citations
TL;DR: In this paper, the magnetization, specific heat and electrical transport properties of C6Eu have been investigated in detail, and the existence of a weak, four-spin exchange interaction is essential for these magnetization processes.
22 citations
TL;DR: The magnetic properties of compounds of the type La 1 − x Gd x Fe 12 B 6 have been studied in high magnetic fields at 4.2 K as discussed by the authors, where the Fe moments are close to magnetic instability and values not larger than about 0.5 μ B.
22 citations