Resonant Pumping of d−d Crystal Field Electronic Transitions as a Mechanism of Ultrafast Optical Control of the Exchange Interactions in Iron Oxides

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https://doi.org/10.1103/PhysRevLett.125.157201
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Keywords

terahertz, ultrafast, antiferromagnets, exchange interaction, oxides

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Resonant Pumping of d−d Crystal Field Electronic Transitions as a Mechanism of Ultrafast Optical Control of the Exchange Interactions in Iron Oxides. / Mikhaylovskiy, Rostislav.
In: Physical review letters, Vol. 125, 157201, 09.10.2020.

Research output: Contribution to Journal/Magazine › Letter › peer-review

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@article{d1b27b628b4e4c17b89ff596fcd238c3,

title = "Resonant Pumping of d−d Crystal Field Electronic Transitions as a Mechanism of Ultrafast Optical Control of the Exchange Interactions in Iron Oxides",

abstract = "The microscopic origin of ultrafast modification of the ratio between the symmetric (J) and antisymmetric (D) exchange interaction in antiferromagnetic iron oxides is revealed, using femtosecond laser excitation as a pump and terahertz emission spectroscopy as a probe. By tuning the photon energy of the laser pump pulse we show that the effect of light on the D/J ratio in two archetypical iron oxides FeBO3 and ErFeO3 is maximized when the photon energy is in resonance with a spin and parity forbidden d−d transition between the crystal-field split states of Fe3+ ions. The experimental findings are supported by a multielectron model, which accounts for the resonant absorption of photons by Fe3+ ions. Our results reveal the importance of the parity and spin-change forbidden, and therefore often underestimated, d−d transitions in ultrafast optical control of magnetism.",

keywords = "terahertz, ultrafast, antiferromagnets, exchange interaction, oxides",

author = "Rostislav Mikhaylovskiy",

note = "{\textcopyright} 2020 American Physical Society ",

year = "2020",

month = oct,

day = "9",

doi = "10.1103/PhysRevLett.125.157201",

language = "English",

volume = "125",

journal = "Physical review letters",

issn = "1079-7114",

publisher = "American Physical Society",

}

RIS

TY - JOUR

T1 - Resonant Pumping of d−d Crystal Field Electronic Transitions as a Mechanism of Ultrafast Optical Control of the Exchange Interactions in Iron Oxides

AU - Mikhaylovskiy, Rostislav

PY - 2020/10/9

Y1 - 2020/10/9

N2 - The microscopic origin of ultrafast modification of the ratio between the symmetric (J) and antisymmetric (D) exchange interaction in antiferromagnetic iron oxides is revealed, using femtosecond laser excitation as a pump and terahertz emission spectroscopy as a probe. By tuning the photon energy of the laser pump pulse we show that the effect of light on the D/J ratio in two archetypical iron oxides FeBO3 and ErFeO3 is maximized when the photon energy is in resonance with a spin and parity forbidden d−d transition between the crystal-field split states of Fe3+ ions. The experimental findings are supported by a multielectron model, which accounts for the resonant absorption of photons by Fe3+ ions. Our results reveal the importance of the parity and spin-change forbidden, and therefore often underestimated, d−d transitions in ultrafast optical control of magnetism.

AB - The microscopic origin of ultrafast modification of the ratio between the symmetric (J) and antisymmetric (D) exchange interaction in antiferromagnetic iron oxides is revealed, using femtosecond laser excitation as a pump and terahertz emission spectroscopy as a probe. By tuning the photon energy of the laser pump pulse we show that the effect of light on the D/J ratio in two archetypical iron oxides FeBO3 and ErFeO3 is maximized when the photon energy is in resonance with a spin and parity forbidden d−d transition between the crystal-field split states of Fe3+ ions. The experimental findings are supported by a multielectron model, which accounts for the resonant absorption of photons by Fe3+ ions. Our results reveal the importance of the parity and spin-change forbidden, and therefore often underestimated, d−d transitions in ultrafast optical control of magnetism.

KW - terahertz

KW - ultrafast

KW - antiferromagnets

KW - exchange interaction

KW - oxides

U2 - 10.1103/PhysRevLett.125.157201

DO - 10.1103/PhysRevLett.125.157201

M3 - Letter

VL - 125

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

M1 - 157201

ER -

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