Spin dynamics in two ReF6 -based single-molecule magnets from NMR and ac susceptibility measurements

2020 ◽  
Vol 101 (13) ◽  
Author(s):  
Oleg M. Vyaselev ◽  
Nataliya D. Kushch ◽  
Eduard B. Yagubskii ◽  
Olga V. Maximova ◽  
Alexander N. Vasiliev
Keyword(s):  
Single Molecule ◽  
Spin Dynamics ◽  
Ac Susceptibility ◽  
Single Molecule Magnets

scholarly journals Spin dynamics in the neutral rare-earth single-molecule magnets[TbPc2]0and[DyPc2]0fromμSRand NMR spectroscopies

2009 ◽  
Vol 79 (22) ◽  
Author(s):  
F. Branzoli ◽  
M. Filibian ◽  
P. Carretta ◽  
S. Klyatskaya ◽  
M. Ruben
Keyword(s):  
Rare Earth ◽  
Single Molecule ◽  
Spin Dynamics ◽  
Single Molecule Magnets

scholarly journals Isotope effects on the spin dynamics of single-molecule magnets probed using muon spin spectroscopy

2018 ◽  
Vol 54 (56) ◽  
pp. 7826-7829 ◽  
Author(s):  
Lorenzo Tesi ◽  
Zaher Salman ◽  
Irene Cimatti ◽  
Fabrice Pointillart ◽  
Kevin Bernot ◽  
...  
Keyword(s):  
Spin Relaxation ◽  
Single Molecule ◽  
Spin Dynamics ◽  
Muon Spin ◽  
Isotope Effects ◽  
Muon Spin Relaxation ◽  
Single Molecule Magnets ◽  
Relaxation Experiments ◽  
Muon Spin Spectroscopy ◽  
Isotopic Effects

Subtle isotopic effects on spin dynamics are captured using Muon Spin Relaxation experiments on isotopically enriched Dy-based single molecule magnets.

scholarly journals Relationship between the Coordination Geometry and Spin Dynamics of Dysprosium(III) Heteroleptic Triple-Decker Complexes

2019 ◽  
Vol 5 (4) ◽  
pp. 65 ◽  
Author(s):  
Tetsu Sato ◽  
Satoshi Matsuzawa ◽  
Keiichi Katoh ◽  
Brian K. Breedlove ◽  
Masahiro Yamashita
Keyword(s):  
Single Molecule ◽  
Magnetic Relaxation ◽  
Spin Dynamics ◽  
Twist Angle ◽  
Magnetic Interactions ◽  
Relaxation Processes ◽  
Coordination Geometry ◽  
Single Molecule Magnets ◽  
Spin Lattice ◽  
The Relationship

When using single molecule magnets (SMMs) in spintronics devices, controlling the quantum tunneling of the magnetization (QTM) and spin-lattice interactions is important. To improve the functionality of SMMs, researchers have explored the effects of changing the coordination geometry of SMMs and the magnetic interactions between them. Here, we report on the effects of the octa-coordination geometry on the magnetic relaxation processes of dinuclear dysprosium(III) complexes in the low-temperature region. Mixed ligand dinuclear Dy3+ triple-decker complexes [(TPP)Dy(Pc)Dy(TPP)] (1), which have crystallographically equivalent Dy3+ ions, and [(Pc)Dy(Pc)Dy(TPP)] (2), which have non-equivalent Dy3+ ions, (Pc2− = phthalocyaninato; TPP2− = tetraphenylporphyrinato), undergo dual magnetic relaxation processes. This is due to the differences in the ground states due to the twist angle (φ) between the ligands. The relationship between the off-diagonal terms and the dual magnetic relaxation processes that appears due to a deviation from D4h symmetry is discussed.

Single-Molecule Magnets: Characterization of Complexes Exhibiting Out-of-Phase AC Susceptibility Signals

1997 ◽  
Vol 305 (1) ◽  
pp. 167-179 ◽  
Author(s):  
Hilary J. Eppley ◽  
Sheila M. J. Aubin ◽  
Michael W. Wemple ◽  
David M. Adams ◽  
Hui-Lien Tsai ◽  
...  
Keyword(s):  
Single Molecule ◽  
Ac Susceptibility ◽  
Single Molecule Magnets

scholarly journals Frontispiz: Control of the Spin Dynamics of Single-Molecule Magnets by using a Quasi One-Dimensional Arrangement

2018 ◽  
Vol 130 (30) ◽  
Author(s):  
Keiichi Katoh ◽  
Satoshi Yamashita ◽  
Nobuhiro Yasuda ◽  
Yasutaka Kitagawa ◽  
Brian K. Breedlove ◽  
...  
Keyword(s):  
Single Molecule ◽  
Spin Dynamics ◽  
Single Molecule Magnets ◽  
One Dimensional

scholarly journals Polarized light spectroscopy of azobenzene or disperse red 1 with Mn12 single-molecule magnets in PMMA film hybrid materials

2009 ◽  
Vol 7 (4) ◽  
pp. 690-696 ◽  
Author(s):  
Takashiro Akitsu ◽  
Chiaki Ishioka ◽  
Tsubasa Itoh
Keyword(s):  
Polymethyl Methacrylate ◽  
Hybrid Materials ◽  
Single Molecule ◽  
Ac Susceptibility ◽  
Polarized Light ◽  
Pmma Film ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet ◽  
Photochromic Compounds ◽  
Disperse Red 1

AbstractA series of organic/inorganic hybrid materials containing the single-molecule magnet [Mn12(CH3COO)16(H2O)4O12]·2CH3COOH·4H2O with the photochromic compounds azobenzene or disperse red 1 cast into polymethyl methacrylate films was prepared. To understand the photomodulation of analogous mixtures’ AC susceptibility, we investigated the molecular alignment based on Weigert’s effect accompanying cycles of cis-trans photoisomerization by alternate irradiations with polarized UV and visible light. Polarized electronic spectra of the hybrid materials demonstrated gradually increasing anisotropy. These features suggest interactions between photochromic compounds and the Mn12 complex in polymethyl methacrylate.

scholarly journals Frontispiece: Control of the Spin Dynamics of Single-Molecule Magnets by using a Quasi One-Dimensional Arrangement

2018 ◽  
Vol 57 (30) ◽  
Author(s):  
Keiichi Katoh ◽  
Satoshi Yamashita ◽  
Nobuhiro Yasuda ◽  
Yasutaka Kitagawa ◽  
Brian K. Breedlove ◽  
...  
Keyword(s):  
Single Molecule ◽  
Spin Dynamics ◽  
Single Molecule Magnets ◽  
One Dimensional

scholarly journals Asymmetric Dinuclear Lanthanide(III) Complexes from the Use of a Ligand Derived from 2-Acetylpyridine and Picolinoylhydrazide: Synthetic, Structural and Magnetic Studies

Molecules ◽  
2020 ◽  
Vol 25 (14) ◽  
pp. 3153
Author(s):  
Diamantoula Maniaki ◽  
Panagiota S. Perlepe ◽  
Evangelos Pilichos ◽  
Sotirios Christodoulou ◽  
Mathieu Rouzières ◽  
...  
Keyword(s):  
Single Molecule ◽  
Metal Ion ◽  
Ac Susceptibility ◽  
Solvent Molecule ◽  
Exchange Interactions ◽  
Experimental Fact ◽  
Anisotropy Axis ◽  
Magnetic Studies ◽  
Single Molecule Magnets ◽  
Magnetization Relaxation

A family of four Ln(III) complexes has been synthesized with the general formula [Ln2(NO3)4(L)2(S)] (Ln = Gd, Tb, Er, and S = H2O; 1, 2 and 4, respectively/Ln = Dy, S = MeOH, complex 3), where HL is the flexible ditopic ligand N’-(1-(pyridin-2-yl)ethylidene)pyridine-2-carbohydrazide. The structures of isostructural MeOH/H2O solvates of these complexes were determined by single-crystal X-ray diffraction. The two LnIII ions are doubly bridged by the deprotonated oxygen atoms of two “head-to-head” 2.21011 (Harris notation) L¯ ligands, forming a central, nearly rhombic {LnIII2(μ-OR)2}4+ core. Two bidentate chelating nitrato groups complete a sphenocoronal 10-coordination at one metal ion, while two bidentate chelating nitrato groups and one solvent molecule (H2O or MeOH) complete a spherical capped square antiprismatic 9-coordination at the other. The structures are critically compared with those of other, previously reported metal complexes of HL or L¯. The IR spectra of 1–4 are discussed in terms of the coordination modes of the organic and inorganic ligands involved. The f-f transitions in the solid-state (diffuse reflectance) spectra of the Tb(III), Dy(III), and Er(III) complexes have been fully assigned in the UV/Vis and near-IR regions. Magnetic susceptibility studies in the 1.85–300 K range reveal the presence of weak, intramolecular GdIII∙∙∙GdIII antiferromagnetic exchange interactions in 1 [J/kB = −0.020(6) K based on the spin Hamiltonian Ĥ = −2J(ŜGd1∙ ŜGd2)] and probably weak antiferromagnetic LnIII∙∙∙LnIII exchange interactions in 2–4. Ac susceptibility measurements in zero dc field do not show frequency dependent out-of-phase signals, and this experimental fact is discussed for 3 in terms of the magnetic anisotropy axis for each DyIII center and the oblate electron density of this metal ion. Complexes 3 and 4 are Single-Molecule Magnets (SMMs) and this behavior is optimally observed under external dc fields of 600 and 1000 Oe, respectively. The magnetization relaxation pathways are discussed and a satisfactory fit of the temperature and field dependencies of the relaxation time τ was achieved considering a model that employs Raman, direct, and Orbach relaxation mechanisms.

Spin dynamics in single-molecule magnets and molecular qubits

2020 ◽  
Vol 49 (29) ◽  
pp. 9916-9928 ◽  
Author(s):  
Daniel Aravena ◽  
Eliseo Ruiz
Keyword(s):  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Spin Dynamics ◽  
Single Molecule Magnets

This review focus on spin dynamics that controls decoherence times in molecular qubits and magnetic anisotropy in single-molecule magnets.

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