Topic
Magnetic structure
About: Magnetic structure is a research topic. Over the lifetime, 10787 publications have been published within this topic receiving 207143 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the authors investigated successive magnetic phase transitions in a frustrated triangular lattice antiferromagnet (TLA) with single crystals and found that the magnetic structure of the intermediate-temperature phase between T N 1 and T N 2 is a quasi-long range ordered sinusoidally amplitude-modulated structure with a temperature dependent propagation wave vector.
Abstract: We reinvestigated successive magnetic phase transitions ( T N1 ∼14.0 K, T N2 ∼10.5 K) in a frustrated triangular lattice antiferromagnet (TLA) CuFeO 2 by neutron diffraction measurements using single crystals. The magnetic structure of the intermediate-temperature phase between T N1 and T N2 is found to be a quasi -long range ordered sinusoidally amplitude-modulated structure with a temperature dependent propagation wave vector ( q q 0). These features of successive phase transitions are well explained by reinvestigated Monte-Carlo simulation of a 2D Ising TLA with competing exchange interactions up to 3rd neighbors, in spite of the Heisenberg spin character of orbital singlet Fe 3+ magnetic ions.
73 citations
TL;DR: In this paper, a multipole expansion around the atomic centers was used to analyze the spin distribution in di- (2, 2, 6, 6-tetramethyl-4-piperidinyl-1-oxyl)-suberate.
73 citations
TL;DR: In this article, it was shown that for materials composed of strongly exchange-coupled magnetic chains with very weak interchain exchange, the interchain dipolar interactions may dominate, leading to sizable ordering temperatures.
Abstract: The weak classical through-space magnetic dipolar interactions have, in general, not been an important component in stabilizing bulk magnets, as the strong quantum-mechanical through-bond exchange couplings dominate. We show that for materials composed of strongly exchange-coupled magnetic chains with very weak interchain exchange, the interchain dipolar interactions may dominate, leading to sizable ordering temperatures. The single-ion anisotropy together with the anisotropy of the dipole interaction determine the magnetic ordering directions. The family of [Mn(porphyrin)]+[cyanocarbon]- magnets is shown to order due to classical interchain dipolar interaction in combination with the single-ion anisotropy, resulting in canted magnetic structures.
73 citations
TL;DR: In this article, the magnetic structure of a Sr2FeMoO6 single crystal was investigated by X-ray magnetic circular dichroism at the L 2,3 edges of Fe and Mo sites.
Abstract: We have investigated the magnetic structure of a Sr2FeMoO6 single crystal by X-ray magnetic circular dichroism at the L2,3 edges of Fe and Mo sites. The spin magnetic moments we find on Fe (3.05μB) and Mo ( − 0.32μB) give, for the first time, a direct confirmation of their ferrimagnetic ordering. The presence of a finite spin moment on Mo together with only very small orbital moments on both Fe and Mo confirms that the predicted half-metallicity of the Sr2FeMoO6 compound is due to a configuration with five localized d electrons forming a high-spin moment on Fe and one s antiparallel delocalized electron shared between the Mo and the other sites.
73 citations
TL;DR: In this paper, the three-dimensional magnetic structure of a transient horizontal magnetic field (THMF) during its evolution through the photosphere using SIRGAUS inversion code is inferred.
Abstract: We infer the three-dimensional magnetic structure of a transient horizontal magnetic field (THMF) during its evolution through the photosphere using SIRGAUS inversion code. The SIRGAUS code is a modified version of SIR (Stokes Inversion based on Response function), and allows for retrieval of information on the magnetic and thermodynamic parameters of the flux tube embedded in the atmosphere from the observed Stokes profiles. Spectropolarimetric observations of the quiet Sun at the disk center were performed with the Solar Optical Telescope on board Hinode with Fe I 630.2 nm lines. Using repetitive scans with a cadence of 130 s, we first detect the horizontal field that appears inside a granule, near its edge. On the second scan, vertical fields with positive and negative polarities appear at both ends of the horizontal field. Then, the horizontal field disappears leaving the bipolar vertical magnetic fields. The results from the inversion of the Stokes spectra clearly point to the existence of a flux tube with magnetic field strength of ~400 G rising through the line-forming layer of the Fe I 630.2 nm lines. The flux tube is located at around log τ500 ~ 0 at Δt = 0 s and around log τ500 ~ –1.7 at Δt = 130 s. At Δt = 260 s, the horizontal part is already above the line-forming region of the analyzed lines. The observed Doppler velocity is maximally 3 km s–1, consistent with the upward motion of the structure as retrieved from the SIRGAUS code. The vertical size of the tube is smaller than the thickness of the line-forming layer. The THMF has a clear Ω-shaped loop structure with the apex located near the edge of a granular cell. The magnetic flux carried by this THMF is estimated to be 3.1 × 1017 Mx.
73 citations