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Solitonic lattice and Yukawa forces in the rare-earth orthoferrite TbFeO3.

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Title: Solitonic lattice and Yukawa forces in the rare-earth orthoferrite TbFeO3.
Authors: Artyukhin, Sergey1, Mostovoy, Maxim1, Jensen, Niels Paduraru2, Le, Duc3, Prokes, Karel3, de Paula, Vinícius G.4, Bordallo, Heloisa N.5, Maljuk, Andrey6, Landsgesell, Sven3, Ryll, Hanjo3, Klemke, Bastian3, Paeckel, Sebastian3, Kiefer, Klaus3, Lefmann, Kim7, Kuhn, Luise Theil2, Argyriou, Dimitri N.8
Source: Nature Materials. Aug2012, Vol. 11 Issue 8, p694-699. 6p.
Subjects: Solitons, Orthoferrites, Rare earth metals, Ferric oxide, Superconductors, Neutrons, Protons, Fluctuations (Physics)
Abstract: The random fluctuations of spins give rise to many interesting physical phenomena, such as the 'order-from-disorder' arising in frustrated magnets and unconventional Cooper pairing in magnetic superconductors. Here we show that the exchange of spin waves between extended topological defects, such as domain walls, can result in novel magnetic states. We report the discovery of an unusual incommensurate phase in the orthoferrite TbFeO3 using neutron diffraction under an applied magnetic field. The magnetic modulation has a very long period of 340?Å at 3?K and exhibits an anomalously large number of higher-order harmonics. These domain walls are formed by Ising-like Tb spins. They interact by exchanging magnons propagating through the Fe magnetic sublattice. The resulting force between the domain walls has a rather long range that determines the period of the incommensurate state and is analogous to the pion-mediated Yukawa interaction between protons and neutrons in nuclei. [ABSTRACT FROM AUTHOR]
Copyright of Nature Materials is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: The random fluctuations of spins give rise to many interesting physical phenomena, such as the 'order-from-disorder' arising in frustrated magnets and unconventional Cooper pairing in magnetic superconductors. Here we show that the exchange of spin waves between extended topological defects, such as domain walls, can result in novel magnetic states. We report the discovery of an unusual incommensurate phase in the orthoferrite TbFeO3 using neutron diffraction under an applied magnetic field. The magnetic modulation has a very long period of 340?Å at 3?K and exhibits an anomalously large number of higher-order harmonics. These domain walls are formed by Ising-like Tb spins. They interact by exchanging magnons propagating through the Fe magnetic sublattice. The resulting force between the domain walls has a rather long range that determines the period of the incommensurate state and is analogous to the pion-mediated Yukawa interaction between protons and neutrons in nuclei. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Nature Materials is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1038/nmat3358
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