Magnetic Attributes of NiFeO Nanoparticles: Influence of Dysprosium Ions (Dy) Substitution.

This paper reports the influence of dysprosium ion (Dy) substitution on the structural and magnetic properties of NiDyFeO (0.0 ≤ ≤ 0.1) nanoparticles (NPs) prepared using a hydrothermal method.

Manganese/Yttrium Codoped Strontium Nanohexaferrites: Evaluation of Magnetic Susceptibility and Mossbauer Spectra.

Manganese (Mn)- and yttrium (Y)-substituted Sr-nanohexaferrites (MYSNHFs) of composition SrMnFeYO (with 0.0 ≤ x ≤ 0.5) were prepared by citrate sol-gel autocombustion method.

Suppression of electron spin decoherence in Rabi oscillations induced by an inhomogeneous microwave field.

The decay of Rabi oscillations provides direct information about coherence of electron spins. When observed in EPR experiments, it is often shortened by spatial inhomogeneity of the microwave field amplitude in a bulk sample. In order to suppress this undesired loss of coherence, we propose an additional dressing of spin states by a weak longitudinal continuous radiofrequency field.

Effect of Rabi splitting on the low-temperature electron paramagnetic resonance signal of anthracite.

Specific distortions of the EPR signal of bulk anthracite are observed at low temperatures. They are accompanied by variations in the microwave oscillator frequency and are explained by the manifestation of the Rabi splitting due to the strong coupling between electron spins and the cavity, combined with the use of an automatic frequency-control (AFC) system. EPR signals are recorded at negligible saturation in the temperature range of 4-300K with use of the AFC system to keep the oscillator frequency locked to the resonant frequency of the TM110 cylinder cavity loaded with the sample.

Multi-photon transitions and Rabi resonance in continuous wave EPR.

The study of microwave-radiofrequency multi-photon transitions in continuous wave (CW) EPR spectroscopy is extended to a Rabi resonance condition, when the radio frequency of the magnetic-field modulation matches the Rabi frequency of a spin system in the microwave field. Using the non-secular perturbation theory based on the Bogoliubov averaging method, the analytical description of the response of the spin system is derived for all modulation frequency harmonics. When the modulation frequency exceeds the EPR linewidth, multi-photon transitions result in sidebands in absorption EPR spectra measured with phase-sensitive detection at any harmonic.

Ferromagnetic interactions in Mn3+ based perovskites.

La0.7Sr0.3Mn(3+)0.