Single-ion and single-chain magnetism in triangular spin-chain oxides

Sr4−x CaxMn2 Co O9 oxides (x = 0 and x = 2) are found to exhibit magnetic responses typical of single-chain magnets (SCMs) and single-ion magnets (SIMs), two features generally investigated in coordination polymers or complexes. The compound x = 0 appears to be a genuine SCM, in that blocking effect...

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Bibliographic Details
Published in:Physical review. B 2017-05, Vol.95 (17), p.174417, Article 174417
Main Authors: Seikh, Md. Motin, Caignaert, Vincent, Perez, Olivier, Raveau, Bernard, Hardy, Vincent
Format: Article
Language:English
Subjects:
Coercivity
Coordination compounds
Coordination polymers
Magnetism
Magnets
Remanence
Spin dynamics
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Summary:Sr4−x CaxMn2 Co O9 oxides (x = 0 and x = 2) are found to exhibit magnetic responses typical of single-chain magnets (SCMs) and single-ion magnets (SIMs), two features generally investigated in coordination polymers or complexes. The compound x = 0 appears to be a genuine SCM, in that blocking effects associated with slow spin dynamics yield remanence and coercivity in the absence of long-range ordering (LRO). In addition, SIM signatures of nearly identical nature are detected in both compounds, coexisting with SCM in x = 0 and with LRO in x = 2. It is also observed that a SCM response can be recovered in x = 2 after application of magnetic field. These results suggest that purely inorganic systems could play a valuable role in the topical issue of the interplay among SIM, SCM, and LRO phenomena in low-dimensional magnetism.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.95.174417