Journal
NEW JOURNAL OF PHYSICS
Volume 24, Issue 4, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1367-2630/ac5f31
Keywords
synchrotron radiation; time-resolved resonant soft x-ray scattering; antiferromagnetic ordering
Categories
Funding
- Photon Factory Program Advisory Committee [2016PF-BL-19B, 2015G556, 2015S2-007, 2013G058, 2013G661]
- MEXT Quantum Leap Flagship Program (MEXT Q-LEAP) Grant [JPMXS0118068681]
- ALPS program of the University of Tokyo
- [19H05824]
- [19H01816]
- [19K23430]
- [17K14334]
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The relationship between the magnetic interaction and photoinduced dynamics in antiferromagnetic perovskites is investigated in this study. The findings show that time-resolved resonant soft x-ray scattering can be used to observe the ultrafast quenching of magnetic ordering and the efficient channel for spin-order manipulation through optically induced charge transfer.
The relationship between the magnetic interaction and photoinduced dynamics in antiferromagnetic perovskites is investigated in this study. In La1/3Sr2/3FeO3 thin films, commensurate spin ordering is accompanied by charge disproportionation, whereas SrFeO3-delta thin films show incommensurate helical antiferromagnetic spin ordering due to increased ferromagnetic coupling compared to La1/3Sr2/3FeO3. To understand the photoinduced spin dynamics in these materials, we investigate the spin ordering through time-resolved resonant soft x-ray scattering. In La1/3Sr2/3FeO3, ultrafast quenching of the magnetic ordering within 130 fs through a nonthermal process is observed, triggered by charge transfer between the Fe atoms. We compare this to the photoinduced dynamics of the helical magnetic ordering of SrFeO3-delta . We find that the change in the magnetic coupling through optically induced charge transfer can offer an even more efficient channel for spin-order manipulation.
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