Journal article
Multiferroic quantum material Ba2Cu1−xMnxGe2O7 (0 ≤ x ≤ 1) as a potential candidate for frustrated Heisenberg antiferromagnet
npj quantum materials, v 9(1), p58
29 Jul 2024
Abstract
Multiferroic Ba
2
CuGe
2
O
7
was anticipated as a potential member of the exciting group of materials hosting a skyrmion or vortex lattice because of its profound Dzyaloshinskii–Moriya interaction (DMI) and the absence of single ion anisotropy (SIA). This phase, however, could not be evidenced and instead, it exhibits a complex incommensurate antiferromagnetic (AFM) cycloidal structure. Its sister compound Ba
2
MnGe
2
O
7
, in contrast, is characterized by a relatively strong in-plane exchange interaction that competes with a non-vanishing SIA and the weak DMI, resulting in a quasi-two-dimensional commensurate AFM structure. Considering this versatility in the magnetic interactions, a mixed solid solution of Cu and Mn in Ba
2
Cu
1−
x
Mn
x
Ge
2
O
7
can hold an interesting playground for its interactive DMI and SIA depending on the mixed spin states of the transition metal ions towards the skyrmion physics. Here, we present a detailed study of the micro- and macroscopic spin structure of the Ba
2
Cu
1
−
x
Mn
x
Ge
2
O
7
solid solution series using high-resolution neutron powder diffraction techniques. We have developed a remarkably rich magnetic phase diagram as a function of the applied magnetic field and
x
, which consists of two end-line phases separated by a potentially quantum-critical phase at
x
= 0.57. An AFM conical structure at zero magnetic field is demonstrated to persist up to
x
= 0.50. Our results provide crucial information on the spin structure and magnetic properties, which are necessary for the general understanding and theoretical developments on multiferroicity in the frame of skyrmion type or frustrated AFM lattice where DMI and SIA play an important role.
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Details
- Title
- Multiferroic quantum material Ba2Cu1−xMnxGe2O7 (0 ≤ x ≤ 1) as a potential candidate for frustrated Heisenberg antiferromagnet
- Creators
- Henrik Thoma - RWTH Aachen UniversityRajesh Dutta - RWTH Aachen UniversityVladimir Hutanu - RWTH Aachen UniversityVeronica Granata - University of SalernoRosalba Fittipaldi - University of SalernoQiang Zhang - Oak Ridge National LaboratoryJeffrey W. Lynn - NIST Center for Neutron ResearchPetr Čermák - Charles UniversityNazir Khan - University of AugsburgShibabrata Nandi - Forschungszentrum JülichManuel Angst - Forschungszentrum Jülich
- Publication Details
- npj quantum materials, v 9(1), p58
- Publisher
- Nature Publishing Group UK
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001280572000001
- Scopus ID
- 2-s2.0-85199983572
- Other Identifier
- 991022004203504721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter
- Quantum Science & Technology