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- W3149889087 abstract "We study the evolution of helical magnetism in MnGe chiral magnet upon partial substitution of Mn for $3d$-Co and $4d$-Rh ions. At high doping levels, we observe spin helices with very long periods---more than ten times larger than in the pure compound---and sizable ordered moments. This behavior calls for a change in the energy balance of interactions leading to the stabilization of the observed magnetic structures. Strikingly, neutron scattering unambiguously shows a double periodicity in the observed spectra at $x=0.5$ and >0.2 for Co- and Rh-doping, respectively. In analogy with observations made in smectic liquid crystals, we suggest that it may reveal the presence of magnetic ``twist grain boundary'' phases, involving a dense short-range correlated network of magnetic screw dislocations. The dislocation cores are here tentatively described as smooth textures, made of nonradial double-core skyrmions." @default.
- W3149889087 created "2021-04-13" @default.
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- W3149889087 date "2017-07-21" @default.
- W3149889087 modified "2023-10-08" @default.
- W3149889087 title "Long-period helical structures and twist-grain boundary phases induced by chemical substitution in the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>Mn</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:mi>Co</mml:mi><mml:mo>,</mml:mo><mml:mi>Rh</mml:mi><mml:mo>)</mml:mo></mml:mrow><mml:mi>x</mml:mi></mml:msub><mml:mi>Ge</mml:mi></mml:mrow></mml:math> chiral magnet" @default.
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- W3149889087 doi "https://doi.org/10.1103/physrevb.96.020413" @default.
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