Study of dynamic spin systems using the femtosecond sum-frequency quantum beats

2014 Fiscal Year Final Research Report

• Project/Area Number: 24655016
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Physical chemistry
• Research Institution: Kobe University
• Principal Investigator: KOHMOTO Toshiro 神戸大学, 理学(系)研究科(研究院), 准教授 (70192573)
• Research Collaborator: MORIYASU Takeshi 神戸大学, 理学研究科, 学術研究員
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: スピン / レーザー

Outline of Final Research Achievements

We developed an all-optical ultrafast magnetic-resonance method with using femtosecond optical pulses, achieved high time resolution and broad-band response, and applied it to the study of the ultrafast magnetic phenomena in excited spin systems and antiferromagnetic materials. We observed the optically induced spin precession and spin echoes to demonstrate the optical manipulation of spin coherence in rare-earth ions in crystals, the ultrafast spin relaxation in the excited triplet state of a transition-metal complex, the optically induced spin precession and ultrafast ferroelectric lattice relaxation in a multiferroic material, and the dynamics of magnetically induced lattice relaxation and electric-field induced magnetization in a magnetoelectric material.

Free Research Field

レーザー分光学，磁気共鳴