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Neutron scattering studies on a single crystal of the highly-correlated electron system, La1-xSrxMnO3 with x~0.3, have been carried out elucidating both the spin and lattice dynamics of this metallic ferromagnet. We report a large measured…

Condensed Matter · Physics 2009-10-28 Michael C. Martin , G. Shirane , Y. Endoh , K. Hirota , Y. Moritomo , Y. Tokura

Co$_3$Sn$_2$S$_2$ has recently been predicted to be a Weyl semimetal in which magnetic order is key to its behavior as a topological material. Here we report unpolarized neutron diffraction and spherical neutron polarimetry measurements,…

We report polarized- and unpolarized- neutron inelastic scattering measurements of the magnetic excitation spectrum in the spin-charge ordered phase of La3/2Sr1/2NiO4. Up to energies of ~30 meV we observe broad magnetic modes characteristic…

Strongly Correlated Electrons · Physics 2009-11-10 P. G. Freeman , A. T. Boothroyd , D. Prabhakaran , C. Frost , M. Enderle , A. Hiess

We report a neutron scattering study of the metallic triangular lattice antiferromagnet PdCrO$_2$. Powder neutron diffraction measurements confirm that the crystalline space group symmetry remains $R\bar{3}m$ below $T_N$. This implies that…

The spin-polarization and magnetic coupling character of N-doped SrTiO3 and BaTiO3 are studied through first-principles calculations. The substitutional N doping at O sites leads to a half-metallic property and produces a magnetic moment of…

Materials Science · Physics 2012-02-13 Kesong Yang , Ying Dai , Baibiao Huang

By combining bulk properties, neutron diffraction and non-resonant X-ray diffraction measurements, we demonstrate that the new multiferroic Cu$_3$Nb$_2$O$_8$ becomes polar simultaneously with the appearance of generalised helicoidal…

Strongly Correlated Electrons · Physics 2015-05-28 R. D. Johnson , Sunil Nair , L. C. Chapon , A. Bombardi , C. Vecchini , D. Prabhakaran , A. T. Boothroyd , P. G. Radaelli

A combination of experimental techniques, e.g. vector-MOKE magnetometry, Kerr microscopy and polarized neutron reflectometry, was applied to study the field induced evolution of the magnetization distribution over a periodic pattern of…

SrRuO3 (SRO) is an itinerant ferromagnet with strong coupling between the charge, spin, and lattice degrees of freedom. This strong coupling suggests that the electronic and magnetic behaviors of SRO are highly susceptible to changes in the…

Strongly Correlated Electrons · Physics 2021-01-07 Hyun Il Seo , Sungmin Woo , Jihyun Kim , Seung Gyo Jeong , Tuson Park , Woo Seok Choi

Fe3Si is a ferromagnetic material with possible applications in magnetic tunnel junctions. When doped with Mn, the material shows a complex magnetic behavior, as suggested by older experiments. We employed the Korringa-Kohn-Rostoker (KKR)…

Materials Science · Physics 2016-08-14 Marjana Ležaić , Phivos Mavropoulos , Stefan Blügel , Hubert Ebert

Co$_3$Sn$_2$S$_2$ has recently emerged as a ferromagnetic Weyl semi-metal. Theoretical investigation of the spin-split bands predicted half metalicity in the compound. Here, we report the detection of a spin polarized supercurrent through a…

The magnetization of the PrFeAsO$_{0.60}$F$_{0.12}$ polycrystalline sample has been measured as functions of temperature and magnetic field $(H)$. The observed total magnetization is the sum of a superconducting irreversible magnetization…

Superconductivity · Physics 2015-05-18 D. Bhoi , P. Mandal , P. Choudhury , S. Dash , A. Banerjee

We report a polarized neutron diffraction study conducted to reveal the nature of the weak ferromagnetic moment in the superconducting ferromagnet UCoGe. We find that the ordered moment in the normal phase in low magnetic fields (B // c) is…

Strongly Correlated Electrons · Physics 2015-05-19 K. Prokes , A. de Visser , Y. K. Huang , B. Fak , E. Ressouche

The phenomenological theory of ferroelectricity in spiral magnets presented in [M. Mostovoy, Phys. Rev. Lett. 96, 067601 (2006)] is generalized to describe consistently states with both uniform and modulated-in-space ferroelectric…

Materials Science · Physics 2009-11-13 A. Cano , E. I. Kats

The Mn spin correlations were studied near the O'-O phase transition at T{JT} = 750 K, up to 950 K with 17O and 139La NMR in a stoichiometric LaMnO3 crystalline sample. The measured local hyperfine fields originate from the electron density…

Strongly Correlated Electrons · Physics 2015-06-15 A. Trokiner , S. Verkhovskii , A. Gerashenko , Z. Volkova , O. Anikeenok , K. Mikhalev , M. Eremin

We study the electronic states of the magnetically ordered Mn3Pt alloy within the density functional theory. Mn3Pt has been believed that one third of Mn atoms have no magnetic moment in an antiferromagnetic phase (so-called the F-phase)…

Materials Science · Physics 2009-11-13 Yohei Kota , Hiroki Tsuchiura , Akimasa Sakuma

Polarized neutron inelastic scattering has been used to measure spin excitations in ferromagnetic La$_{0.82}$Sr$_{0.18}$CoO$_{3}$. The magnon spectrum of these spin excitations is well defined at low energies but becomes heavily damped at…

Strongly Correlated Electrons · Physics 2010-10-08 R. A. Ewings , P. G. Freeman , M. Enderle , J. Kulda , D. Prabhakaran , A. T. Boothroyd

The magnon dispersion of ferromagnetic SrRuO$_3$ was studied by inelastic neutron scattering experiments on single crystals as function of temperature. Even at low temperature the magnon modes exhibit substantial broadening pointing to…

We have investigated the magnetic transition and magnetic structure of triple-layered ruthenate Sr4Ru3O10 directly using neutron scattering techniques. Only one ferromagnetic phase is observed, and previously proposed antiferromagnetic…

Materials Science · Physics 2007-05-23 Wei Bao , Z. Q. Mao , M. Zhou , J. Hooper , J. W. Lynn , R. S. Freitas , P. Schiffer , Y. Liu , H. Q. Yuan , M. Salamon

We have studied the effects of Mn concentration on the ballistic spin-polarized transport through diluted magnetic semiconductor heterostructures with a single paramagnetic layer. Using a fitted function for zero-field conduction band…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Alireza Saffarzadeh

Spin-orbit torques (SOTs) from transition metal oxides (TMOs) in conjunction with magnetic materials have recently attracted tremendous attention for realizing high-efficient spintronic devices. SrRuO3 is a promising candidate among TMOs…

Materials Science · Physics 2024-03-04 Sheng Li , Bin Lao , Zengxing Lu , Xuan Zheng , Kenan Zhao , Liguang Gong , Tao Tang , Keyi Wu , Run-Wei Li , Zhiming Wang