Magnetic Anisotropy Trends along a Full 4f-Series: The Effect.

The combined experimental and computational study of the 13 magnetic complexes belonging to the Na[LnDOTA(HO)] (HDOTA = tetraazacyclododecane-,',″,‴-tetraacetic acid and Ln = Ce-Yb) family allowed us to identify a new trend: the orientation of the magnetic anisotropy tensors of derivatives differing by seven electrons practically coincide. We name this trend the effect. Experiments and theory fully agree on the match between the magnetic reference frames (e.

Electronic Structure and Magnetic Anisotropy in Lanthanoid Single-Ion Magnets with C Symmetry: The Ln(trenovan) Series.

We report the syntheses and the magnetic characterization of a new series of lanthanide complexes, in which the Ce, Nd, Gd, Dy, Er, and Yb derivatives show single-molecule magnet behavior. These complexes, named Ln(trenovan), where Htrenovan is tris(((3-methoxysalicylidene)amino)ethyl)amine, exhibit trigonal symmetry and the Ln(III) ion is heptacoordinated. Their molecular structure is then very similar to that of the previously reported Ln(trensal) series, where Htrensal is 2,2',2″-tris(salicylideneimino)triethylamine.

Relaxation Dynamics and Magnetic Anisotropy in a Low-Symmetry Dy(III) Complex.

The magnetic behaviour of a Dy(LH)3 complex (LH(-) is the anion of 2-hydroxy-N'-[(E)-(2-hydroxy-3-methoxyphenyl)methylidene]benzhydrazide) was analysed in depth from both theoretical and experimental points of view. Cantilever torque magnetometry indicated that the complex has Ising-type anisotropy, and provided two possible directions for the easy axis of anisotropy due to the presence of two magnetically non-equivalent molecules in the crystal. Ab initio calculations confirmed the strong Ising-type anisotropy and disentangled the two possible orientations.

Quantum coherence in a processable vanadyl complex: new tools for the search of molecular spin qubits.

Electronic spins in different environments are currently investigated as potential qubits, the logic units of quantum computers. These have to retain memory of their quantum state for a sufficiently long time (phase memory time, ) allowing quantum operations to be performed. For molecular based spin qubits, strategies to increase phase coherence by removing nuclear spins are rather well developed, but it is now crucial to address the problem of the rapid increase of the spin-lattice relaxation rate, , with increasing temperature that hampers their use at room-temperature.

Determination of magnetic anisotropy in the LnTRENSAL complexes (Ln = Tb, Dy, Er) by torque magnetometry.

We report here a study about the magnetic anisotropy of the LnTRENSAL complexes (Ln = Tb, Dy, Er) performed by using cantilever torque magnetometry and electron paramagnetic resonance. For all of the compounds, we extracted a set of crystal-field parameters to obtain the energy-level splitting of the ground-state multiplet.

Beyond the anisotropy barrier: slow relaxation of the magnetization in both easy-axis and easy-plane Ln(trensal) complexes.

We present a spectroscopic and magnetic (both static and dynamic) characterization of two isostructural Dy and Er complexes evidencing that, despite the different types of magnetic anisotropy, the two molecules show similar slow relaxation of the magnetization in a static magnetic field.