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Y. Behovits

As seen in: Nature, Physical Review B
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Articles by Y. Behovits

Terahertz Néel spin-orbit torques drive nonlinear magnon dynamics in antiferromagnetic Mn2Au - Nature Communications

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By Y. Behovits, O. Gueckstock, Y. Lytvynenko, M. Wolf, O. Gomonay, M. Kläui, A. L. Chekhov, S. Reimers, M. Jourdan
| Nature Verified
Abstract Antiferromagnets have large potential for ultrafast coherent switching of magnetic order with minimum heat dissipation. In materials such as Mn2Au and CuMnAs, electric rather than magnetic fields may control antiferromagnetic order by Néel spin-orbit torques (NSOTs). However, these torques have not yet been observed on ultrafast time scales.
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Broadband Spintronic Detection of the Absolute Field Strength of Terahertz Electromagnetic Pulses

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By A.L. Chekhov, Freie Universität Berlin, Y. Behovits, U. Martens
| Physical Review B
We demonstrate the detection of broadband intense terahertz electromagnetic pulses by Zeeman-torque sampling (ZTS). Our approach is based on magneto-optic probing of the Zeeman torque that the terahertz magnetic field exerts on the magnetization of a ferromagnet. Using an 8-nm-thick iron film as a sensor, we detect pulses from a silicon-based spintronic terahertz emitter with a bandwidth of 0.1–11 THz and a peak field of >0.1 MV/cm.
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Broadband Spintronic Terahertz Source with Peak Electric Fields Exceeding 1.5 MV/cm

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By Freie Universität Berlin, Y. Behovits, R. Rouzegar, A.L. Chekhov
| Physical Review B
Abstract In this work, we improve the performance of an optically pumped spintronic terahertz emitter (STE) by a factor of up to 6 in field amplitude through an optimized photonic and thermal environment.
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Ultrafast Demagnetization of Iron Induced by Optical versus Terahertz Pulses

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By Fachbereich Physik, Freie Universität Berlin, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Y. Behovits
| Physical Review B
Abstract We study ultrafast magnetization quenching of ferromagnetic iron following excitation by an optical versus a terahertz pump pulse. While the optical pump (photon energy of 3.1 eV) induces a strongly nonthermal electron distribution, terahertz excitation (4.1 meV) results in a quasithermal perturbation of the electron population. The pump-induced spin and electron dynamics are interrogated by the magneto-optic Kerr effect (MOKE).
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