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Evolution of magneto-orbital order upon B-site electron doping in Na1−xCaxMn7O12 quadruple perovskite manganites

Abstract:
We present the discovery and refinement by neutron powder diffraction of a new magnetic phase in the Na1-xCaxMn7O12 quadruple perovskite phase diagram, which is the incommensurate analogue of the well-known pseudo-CE phase of the simple perovskite manganites. We demonstrate that incommensurate magnetic order arises in quadruple perovskites due to the exchange interactions between A and B sites. Furthermore, by constructing a simple mean field Heisenberg exchange model that generically describes both simple and quadruple perovskite systems, we show that this new magnetic phase unifies a picture of the interplay between charge, magnetic and orbital ordering across a wide range of compounds.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevLett.120.257202

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author


Publisher:
American Physical Society
Journal:
Physical Review Letters More from this journal
Volume:
120
Issue:
25
Pages:
257202
Publication date:
2018-06-19
Acceptance date:
2018-05-22
DOI:
EISSN:
1079-7114
ISSN:
0031-9007


Pubs id:
pubs:853645
UUID:
uuid:bcd704d9-011d-4279-914d-5ac67be4f0a7
Local pid:
pubs:853645
Source identifiers:
853645
Deposit date:
2018-05-23

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