This title appears in the Scientific Report :
2020
Please use the identifier:
http://hdl.handle.net/2128/26835 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.102.054413 in citations.
Magnetoelectric coupling in the mixed erythrosiderite [(NH$_4$)$_{1−x}$K$_x$]$_2$[FeCl$_5$(H$_2$O)]
Magnetoelectric coupling in the mixed erythrosiderite [(NH$_4$)$_{1−x}$K$_x$]$_2$[FeCl$_5$(H$_2$O)]
We present a study of the dielectric, structural and magnetic properties of the multiferroic orlinear magnetoelectric substitution series [(NH4)1xKx]2[FeCl5(H2O)]. Pyroelectric currents, magneticsusceptibilities, and thermodynamic properties were examined on large single crystals of theerythrosider...
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Personal Name(s): | Brüning, Daniel (Corresponding author) |
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Fröhlich, Tobias / Langenbach, Malte / Leich, Thomas / Meven, Martin (Corresponding author) / Becker, Petra / Bohatý, Ladislav / Grüninger, Markus / Braden, Markus / Lorenz, Thomas | |
Contributing Institute: |
Heinz Maier-Leibnitz Zentrum; MLZ Streumethoden; JCNS-2 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Physical Review B Physical review / B, 102 102 (2020 2020) 5 5, S. 054413 054413 |
Imprint: |
Woodbury, NY
Inst.
2020
|
DOI: |
10.1103/PhysRevB.102.054413 |
Document Type: |
Journal Article |
Research Program: |
FRM II / MLZ Quantum Condensed Matter: Magnetism, Superconductivity Jülich Centre for Neutron Research (JCNS) |
Subject (ZB): | |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.102.054413 in citations.
We present a study of the dielectric, structural and magnetic properties of the multiferroic orlinear magnetoelectric substitution series [(NH4)1xKx]2[FeCl5(H2O)]. Pyroelectric currents, magneticsusceptibilities, and thermodynamic properties were examined on large single crystals of theerythrosiderite compounds and detailed magnetic-eld versus temperature phase diagrams are derivedfor three dierent substitution levels. With increasing potassium concentration the material istuned from a multiferroic (x 0:06) to a linear magnetoelectric (x 0:15) ground state. In contrastto the respective pure parent compounds with x = 0 or 1, however, the ferroelectric or linear magnetoelectricpolarization in none of the substituted samples is switchable by external electric elds,because these samples exhibit a signicant electric polarization already above the magnetic orderingtransition. The polarization arises at a higher-lying structural phase transition that is examined byTHz spectroscopy and by comprehensive neutron-diraction experiments on a deuterated pure singlecrystal. The structural phase transition is attributed to an ordering of NH+4 tetrahedra but doesnot break inversion symmetry in the pure material, while nite K content causes pyroelectricity. |