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Magnetic skyrmions have so far been treated as two-dimensional spin structures characterized by a topological winding number describing the rotation of spins across the skyrmion. However, in real systems with a finite thickness of the…

We carried out detailed studies of the magnetic structure, magnetoelastic coupling, and thermal properties of EuCrO$_3$ nano-powders from room temperature to liquid helium temperature. Our neutron powder diffraction and X-ray powder…

Strongly Correlated Electrons · Physics 2016-04-07 M. Taheri , F. S. Razavi , Z. Yamani , R. Flacau , P. G. Reuvekamp , A. Schulz , R. K. Kremer

We have investigated the magnetic properties of a non-symmorphic correlated material, TbAgSb2. It consists of a quasi-two-dimensional structure of Sb atoms which hosts topologically non-trivial fermions. We prepared high quality single…

Strongly Correlated Electrons · Physics 2024-10-04 Saswata Halder , Kalobaran Maiti

Superposed symmetry-equivalent magnetic ordering wave vectors can lead to topologically non-trivial spin textures, such as magnetic skyrmions and hedgehogs, and give rise to novel quantum phenomena due to fictitious magnetic fields…

We report the discovery of topological magnetism in the candidate magnetic Weyl semimetal CeAlGe. Using neutron scattering we find this system to host several incommensurate, square-coordinated multi-$\vec{k}$ magnetic phases below…

Strongly Correlated Electrons · Physics 2020-01-22 P. Puphal , V. Pomjakushin , N. Kanazawa , V. Ukleev , D. J. Gawryluk , J. Ma , M. Naamneh , N. C. Plumb , L. Keller , R. Cubitt , E. Pomjakushina , J. S. White

Muon-spin rotation data collected at ambient pressure ($p$) and at $p=2.42$ GPa in MnP were analyzed to check their consistency with various low- and high-pressure magnetic structures reported in the literature. Our analysis confirms that…

Superconductivity · Physics 2019-02-07 R. Khasanov , A. Amato , P. Bonfà , Z. Guguchia , H. Luetkens , E. Morenzoni , R. De Renzi , N. D. Zhigadlo

We report a comprehensive neutron diffraction study of the crystal structure and magnetic order in a series of single-crystal and powder samples of SrFeO$_{3-\delta}$ in the vacancy range $0 \leq \delta \leq 0.23$. The data provide detailed…

Strongly Correlated Electrons · Physics 2015-06-05 M. Reehuis , C. Ulrich , A. Maljuk , Ch. Niedermayer , B. Ouladdiaf , A. Hoser , T. Hofmann , B. Keimer

Recently, orthorhombic CuMnAs has been proposed to be a magnetic material where topological fermions exist around the Fermi level. Here we report the magnetic structure of the orthorhombic Cu0.95MnAs and Cu0.98Mn0.96As single crystals.…

Materials Science · Physics 2017-12-13 Eve Emmanouilidou , Huibo Cao , Peizhe Tang , Xin Gui , Chaowei Hu , Bing Shen , Junyi Wu , Shou-Cheng Zhang , Weiwei Xie , Ni Ni

We report the results of $^{139}$La NMR measurements in the non-centrosymmetric superconductor LaRhGe$_3$. This material crystallizes in a tetragonal structure without inversion symmetry and exhibits type-I superconductivity below 385 mK.…

Superconductivity · Physics 2025-01-24 Shunsaku Kitagawa , Hiroyasu Matsudaira , Kenji Ishida , Mohamed Oudah

The results of three-dimensional MHD numerical simulations are used to investigate the characteristic properties of the magnetic-field structures in the accretion disks of semi-detached binary systems. It is assumed that the intrinsic…

Solar and Stellar Astrophysics · Physics 2010-07-21 A. G. Zhilkin , D. V. Bisikalo

The spiral magnetic structure and underlying spin lattice of BiMnFe2O6 are investigated by low-temperature neutron powder diffraction and density functional theory band structure calculations. In spite of the random distribution of the Mn3+…

Structural and magnetic properties of the geometrically frustrated layered compound YBaCo4O7 have been studied by magnetization and neutron diffraction. A layered type crystal structure, with alternating tetrahedral layers of Kagom\'e and…

Strongly Correlated Electrons · Physics 2015-02-13 A. K. Bera , S. M. Yusuf , S. Banerjee

The lack of inversion symmetry in the crystal lattice of magnetic materials gives rise to complex non-collinear spin orders through interactions of relativistic nature, resulting in interesting physical phenomena, such as emergent…

We synthesized single crystals of the new hexagonal compounds A$_2$Cu$_3$SnF$_{12}$ with A=Cs and Rb, and investigated their magnetic properties. These compounds are composed of Kagom\'{e} layers of corner-sharing CuF$_6$-octahedra.…

Strongly Correlated Electrons · Physics 2009-11-13 T. Ono , K. Morita , M. Yano , H. Tanaka , K. Fujii , H. Uekusa , Y. Narumi , K. Kindo

Topological magnets are a new family of quantum materials providing great potential to realize emergent phenomena, such as quantum anomalous Hall effect and axion-insulator state. Here we present our discovery that stoichiometric…

In spinels ACr2O4 (A=Mg, Zn) realisation of the classical pyrochlore Heisenberg antiferromagnet model is complicated by a strong spin-lattice coupling: the extensive degeneracy of the ground state is lifted by a magneto-structural…

We report a single-crystal neutron diffraction and inelastic neutron scattering study on the spin 1/2 cuprate Cu$_3$Bi(SeO$_3$)$_2$O$_2$Cl, complemented by dielectric and electric polarization measurements. The study clarifies a number of…

Multiple-$Q$ magnetic orderings represent magnetic textures composed of superpositions of multiple spin density waves or spin spirals, as represented by skyrmion crystals and hedgehog lattices. Such magnetic orderings have been observed in…

Strongly Correlated Electrons · Physics 2022-05-18 Yasuyuki Kato , Yukitoshi Motome

Realizing topological superconductivity in stoichiometric materials is a key challenge in condensed matter physics. Here, we report the discovery of ternary germanide superconductors, $M$IrGe ($M$ = Ti, Hf), as prime candidates for…

Electronic structure calculations, using the charge and spin self-consistent Korringa- Kohn-Rostoker (KKR) method, have been performed for several $R$Mn$X$ compounds ($R$ = Mg, Ca, Sr, Ba, Y; $X$ = Si, Ge) of the CeFeSi-type structure. The…

Materials Science · Physics 2009-11-10 V. Klosek , J. Tobola , A. Verniere , S. Kaprzyk , B. Malaman
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