Peculiarities of Rabi oscillations and free induction decay in two-component nuclear spin systems with Ising nuclei interactions

Article

关键词: SINGLE-PULSE ECHO;    ARBITRARY DURATION;    PHASE-SEPARATION;    DYNAMICS;    FIELD;    EXCITATION;    SIGNALS;    LA-139;   

DOI  :  10.1103/PhysRevB.104.174416

来源: SCIE

【 摘 要 】

Nuclear-spin systems in manganites, having separation of ferromagnetic and antiferromagnetic phases, which are manifested as two lines in the NMR spectrum, are studied. Taking into account the Ising nuclear interaction, we obtain an analytical description of Rabi oscillations and free-induction decay in two-component nuclear-spin systems when a radio-frequency pulse nonresonantly excites the nuclei of one magnetic phase and resonantly excites the nuclei of the other phase. It is revealed that the nonlinearity of interaction between the nuclei of these phases results in additional harmonics in the Rabi oscillations of the nonresonantly excited subsystem. We also show that the Ising interaction inside this subsystem forms multiple echoes in the free-induction decay, whereas their nonmonotonic damping and amplitude modulation is caused by the spin coupling between the subsystems.

【 授权许可】

Free