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Magnetic structure
About: Magnetic structure is a research topic. Over the lifetime, 10787 publications have been published within this topic receiving 207143 citations.
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TL;DR: This work has synthesized, for the first time, highly spin polarized complex magnetic oxide nanostructures embedded in a paramagnetic matrix by electron beam lithography and ion implantation.
Abstract: The realization of spin-based devices requires high density, ordered arrays of magnetic materials with a high degree of spin polarization at surfaces. We have synthesized, for the first time, highly spin polarized complex magnetic oxide nanostructures embedded in a paramagnetic matrix by electron beam lithography and ion implantation. Imaging the magnetic domains with X-ray photoemission electron microscopy and magnetic force microscopy reveals a delicate balance between magnetocrystalline, magnetoelastic, and magnetostatic energies that can be tuned by the choice of SrTiO3 substrate orientation, film thickness, island size, and island shape.
82 citations
TL;DR: Using a combination of neutron diffraction and x-ray magnetic linear dichroism, the spin axis and magnetic structure in tetragonal CuMnAs is determined, and the presence of an interfacial uniaxial magnetic anisotropy is revealed.
Abstract: Tetragonal CuMnAs is an antiferromagnetic material with favourable properties for applications in spintronics. Using a combination of neutron diffraction and x-ray magnetic linear dichroism, we determine the spin axis and magnetic structure in tetragonal CuMnAs, and reveal the presence of an interfacial uniaxial magnetic anisotropy. From the temperature-dependence of the neutron diffraction intensities, the Neel temperature is shown to be (480 ± 5) K. Ab initio calculations indicate a weak anisotropy in the (ab) plane for bulk crystals, with a large anisotropy energy barrier between in-plane and perpendicular-to-plane directions.
81 citations
TL;DR: In this article, the para-to-ferromagnetic transition in Fe2P has been studied using Mossbauer spectroscopy and the magnetic hyperfine fields drop abruptly from about half of their saturation values to zero at 214.5 K indicating a first order transition.
81 citations
TL;DR: In this article, the authors showed that the low-temperature magnetic phase consists of planar ferromagnetic (FM) and A-type antiferromagnetic components, indicating a canted AFM ordering.
Abstract: Comprehensive neutron-diffraction studies on La 2-2 x Sr 1+2 x Mn 2 O 7 ( x =0.40,0.45 and 0.48) single crystals have revealed that the low-temperature magnetic phase consists of planar ferromagnetic (FM) and A-type antiferromagnetic (AFM) components, indicating a canted AFM ordering. Upon increasing the hole concentration x , the canting angle between planes changes from 6.3° (nearly planar FM) at x =0.40 to 180° (A-type AFM) at x =0.48, while the ordering temperature of the FM component, T C , decreases from 120 K to 0 K, correspondingly. We have also discovered that the A-type AFM ordering remains above T C and shows an anomalous exponential decrease to T N ∼200 K. This newly found intermediate A-type AFM phase may play a significant role in the enhancement of CMR effects in this layered Mn perovskite system.
81 citations
TL;DR: In this article, it was shown that MnP is ferromagnetic between 50° and 291°K, with 1.3 μB/Mn atom directed along the orthorhombic Pbnm cell.
Abstract: Neutron diffraction measurements confirm that MnP is ferromagnetic between 50° and 291°K, with 1.3 μB/Mn atom directed along [001] of the orthorhombic Pbnm cell. Previous measurements at low temperatures indicated that the compound was metamagnetic; neutron diffraction measurements in zero magnetic field reveal a modulated structure in which ferromagnetically coupled pairs of Mn spins are arranged in a spiral whose axis of propagation and rotation is [100]. A preliminary account is given of the magnetic behavior of the compound at the metamagnetic‐ferromagnetic transition point.
81 citations