A nonsymmetric Dy2 single-molecule magnet with two relaxation processes triggered by an external magnetic field: a theoretical and integrated EPR study of the role of magnetic-site dilution
Date
2022-02-07Author
Lalioti, NikoliaNastopoulos, Vassilis
Panagiotou, Nikos
Tasiopoulos, Anastasios J.
Ioannidis, Nikolaos
Van Slageren, Joris
Zhang, Peng
Rajaraman, Gopalan
Swain, Abinash
Tangoulis, Vassilis
ISSN
1477-9226Publisher
Royal Society of ChemistryPlace of publication
Cambridge, UKSource
Dalton transactionsVolume
51Issue
5Pages
1985-1994Google Scholar check
Keyword(s):
Metadata
Show full item recordAbstract
The 1 : 2 reaction between Dy(O2CMe)3·4H2O and 1-acetyl-2-napthol (LH) in MeOH has provided access to the complex [Dy2L6(MeOH)]·MeOH (1·MeOH) in a good yield. The structures of the isomorphous complex 1·MeOH and its doped diamagnetic yttrium analogue [Dy0.14Y1.86L6(MeOH)]·MeOH (Dy@Y2) have been determined by single-crystal X-ray crystallography and characterized based on elemental analyses, IR spectra, and powder X-ray patterns. Combined dc and ac magnetic susceptibility and the magnetization data for 1 suggest that this complex shows slow magnetic relaxation. Under a 0 Oe dc field, a single relaxation mechanism is seen while two magnetization relaxation processes are evident under a 1500 G external magnetic field. The fit to the Arrhenius law has been performed using the 1.8-10 K ac data, affording an effective barrier for the magnetization reversal of 13 K and 7 K under the external dc field. Theoretical studies have been performed using ab initio and density functional methodologies to understand the electronic structure and the magnetic relaxation dynamics resulting from the single DyIII ion as well as from the dinuclear exchange-coupled states. Rich powder EPR spectra at the X-band and Q-band were obtained from Dy@Y2, as well as from the 1·MeOH dimer, while simulation studies revealed the ferromagnetic nature of the interaction between the DyIII ions in accordance with theoretical studies.
Collections
Cite as
Related items
Showing items related by title, author, creator and subject.
-
Article
Inducing single-molecule magnetism in a family of loop-of-loops aggregates: Heterometallic Mn40Na4 clusters and the homometallic Mn44 analogue
Moushi, Eleni E.; Lampropoulos, Christos; Wernsdorfer, W.; Nastopoulos, Vassilios; Christou, George; Tasiopoulos, Anastasios J. (2010)The syntheses, crystal structures, and magnetic properties of a new family of heterometallic Mn40Na4 and homometallic Mn44 loop-of-loops aggregates are reported. The reactions of [Mn3O(O 2CMe)6(py)3]•py with 1,3-propanediol ...
-
Article
Localized magnetic fields in arbitrary directions using patterned nanomagnets
McNeil, R. P. G.; Schneble, R. J.; Kataoka, M.; Ford, C. J. B.; Kasama, T.; Dunin-Borkowski, R. E.; Feinberg, J. M.; Harrison, R. J.; Barnes, C. H. W.; Tse, D. H. Y.; Trypiniotis, Theodossis; Bland, J. A. C.; Anderson, D.; Jones, G. A. C.; Pepper, M. (2010)Control of the local magnetic fields desirable for spintronics and quantum information technology is not well developed. Existing methods produce either moderately small local fields or one field orientation. We present ...
-
Article
Giant single-molecule magnets: A {Mn84} torus and its supramolecular nanotubes
Tasiopoulos, Anastasios J.; Vinslava, A.; Wernsdorfer, W.; Abboud, K. A.; Christou, George (2004)A meeting of two magnetic worlds: The giant (ca. 4.2 nm) {Mn84} cluster, shown, has a torus structure and is a single-molecule magnet (SMM). It represents a meeting of the molecular (bottom-up) and classical (top-down) ...