Topic
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: The spin structures and magnetization curves of R 2 Fe 14 B (R: rare earth atom) are calculated on a basis of a simplified Hamiltonian as discussed by the authors, and favorable parameters are found that reproduce the observed spin structure, the magnetization curve and the spin reorientation temperature.
71 citations
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TL;DR: In this paper, the first field-induced state was obtained on a frustrated triangular lattice antiferromagnet (TLA) CuFeO 2 under an applied magnetic field up to 14.5 T.
Abstract: Neutron diffraction studies on a frustrated triangular lattice antiferromagnet (TLA) CuFeO 2 have been performed under an applied magnetic field up to 14.5 T. The first-field-induced state was foun...
71 citations
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TL;DR: It is shown that the magnetic structure of epitaxially grown L10-IrMn (a collinear AFM) is distinct from the widely presumed bulk one, and it is revealed that this magnetic structure induces a large isotropic bulk contribution and a comparable anisotropic interfacial contribution to the SOT efficiency.
Abstract: Spin-orbit torque (SOT) offers promising approaches to developing energy-efficient memory devices by electric switching of magnetization. Compared to other SOT materials, metallic antiferromagnet (AFM) potentially allows the control of SOT through its magnetic structure. Here, combining the results from neutron diffraction and spin-torque ferromagnetic resonance experiments, we show that the magnetic structure of epitaxially grown L10-IrMn (a collinear AFM) is distinct from the widely presumed bulk one. It consists of twin domains, with the spin axes orienting toward [111] and [−111], respectively. This unconventional magnetic structure is responsible for much larger SOT efficiencies up to 0.60 ± 0.04, compared to 0.083 ± 0.002 for the polycrystalline IrMn. Furthermore, we reveal that this magnetic structure induces a large isotropic bulk contribution and a comparable anisotropic interfacial contribution to the SOT efficiency. Our findings shed light on the critical roles of bulk and interfacial antiferromagnetism to SOT generated by metallic AFM.
71 citations
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TL;DR: In this paper, a study of the crystallographic and magnetic structures of the double perovskites Sr2MnMoO6, Sr2mnWO6 and Ca2mmwO6 has been carried out on polycrystalline samples using NPD data.
Abstract: A study of the crystallographic and magnetic structure of the double perovskites Sr2MnMoO6, Sr2MnWO6 and Ca2MnWO6 has been carried out on polycrystalline samples using neutron powder diffraction (NPD) data. A room temperature analysis of high-resolution NPD patterns has shown that these compounds crystallize, at room temperature, in the monoclinic space group P 21 /n. The three perovskites contain divalent Mn cations. Ca2MnWO6 presents the strongest distortion with respect to the ideal cubic perovskite structure. The low-temperature antiferromagnetic ordering has been followed from sequential NPD data. The magnetic structures are defined by the propagation vectors k = (1/2, 0, 1/2) for Sr2MnMoO6 and Sr2MnWO6, and k = (0, 1/2, 1/2) for Ca2MnWO6. The possible arrangements for the Mn2+ magnetic moments have been derived from a group theory analysis.
71 citations
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TL;DR: In this paper, it was shown that a powdered CuFeO 2, a quasi-two-dimensional antiferromagnet on a triangular lattice (AFT), has two successive magnetic phase transitions at low temperatures.
Abstract: Neutron diffraction study revealed that a powdered CuFeO 2 , a quasi-two-dimensional antiferromagnet on a triangular lattice (AFT), has two successive magnetic phase transitions at low temperatures. In the high-temperature phase below T N1 =16 K, it has a monoclinic magnetic unit cell with five spins in a layer (\(\sqrt{7}a\times\sqrt{7}a\times2{c}\), γ=141.78°). At T N2 =10 K, it shows a discontinuous transition and enters the low-temperature phase with an orthorhombic magnetic unit cell with four spins in a layer (\(\sqrt{3}a\times2{a}\times2{c}\)). In both magnetic structures, spins are collinear and parallel to the c axis.
71 citations