Through an extensive set of SQUID magnetic measurements, X-ray absorption spectroscopy, and X-ray magnetic circular dichroism, we have determined the nature of the metastable photomagnetic phase in the cyano-bridged 3D network Cs(2)Cu(7)[Mo(CN)(8)](4). The photomagnetic effect is induced by the photoconversion of Mo(IV) ions in low spin (LS) configuration (S = 0) into Mo(IV) ions in high spin (...

We demonstrate that intense laser pulses can be used to directly control the spins in ferrimagnetic garnet films. Through an ultrafast and nonthermal photomagnetic effect the magnetocrystalline anisotropy is modified to create a new long-lived equilibrium orientation for the magnetization. Simultaneously, the magnetization is rotated into this new state by precession in a strong transient optic...

Reversible photomagnetic effects were demonstrated at room temperature by the use of a new iron(II) complex t100c0-[Fe()3](BF4)(2).3H2O ( =phenyl(2-pyridin-2-yl-3H-benzoimidazol-5-yl)diazene), based on the strategy of the so-called "ligand-driven light-induced spin change" (LD-LISC) effect. The complex showed thermal spin crossover in both solid and solution states, showing a transition tempera...

The cyanide-bridged coordination polymer mimics the topology and porosity of MOF-74. It also shows additional highly desired functionalities: chirality photomagnetic effect, which makes it a truly multifunctional molecular material.

The thermodynamic properties of the photomagnetic Prussian blue analog K0.3Co[Fe(CN)6]0.77 · 3.6H2O, which exhibits a charge-transfer-induced spin transition (CTIST), are reported. According to the thermal history of the sample, different low-temperature states are obtained: a quenched high-spin state (Q), a low-spin state (LT) achieved through the decay of the Q state, and an intermediate stat...

The photomagnetic effect has been investigated in a Fez. loLi0.45Mn0.4504 ferrite by looking at the variations of the permeability under light irradiation. It is shown that the time constact of the phenomenon increases with temperature, resulting in a negative activation energy w = 1.3 x 10-2 eV. The explanation of the results is grounded on the photo-induced electron migration between Mn2+ and...

The photomagnetic properties of a new Fe(II) macrocyclic family [Fe(L(xyz)N5)(CN)2]·nH2O were investigated with respect to the T(LIESST) versus T(1/2) relationship. These compounds are diamagnetic below 400 K with T(LIESST) values above 100 K, which indicates that this family presents an unconventional LIESST effect that is much higher than the expected T0 = 180 K line for macrocyclic complexes.

Photomagnetic compounds are usually achieved by assembling preorganized individual molecules into rationally designed molecular architectures via the bottom-up approach. Here we show that a magnetic response to light can also be enforced in a nonphotomagnetic compound by applying mechanical stress. The nonphotomagnetic cyano-bridged Fe(II)-Nb(IV) coordination polymer {[Fe(II)(pyrazole)4]2[Nb(IV...

The effect of low-powered polarized light on magnetic characteristics of ferrimagnetic garnet films has been studied at room temperatures by means of magneto-optical Faraday effect. A local magnetization of the film, occurred under the illumination, was carried out in the direction determined by orientation of polarization vector. The effect, accompanied by the domain structure reconstruction, ...