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Ultrafast demagneti...
Ultrafast demagnetization of Pt magnetic moment in L1(0)-FePt probed by magnetic circular dichroism at a hard x-ray free electron laser
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- Yamamoto, Kohei (författare)
- Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan;Univ Tokyo, Dept Phys, Tokyo 1130033, Japan;Inst Mol Sci, Okazaki, Aichi 4448585, Japan
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- Kubota, Yuya (författare)
- Japan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan;RIKEN, SPring 8 Ctr, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan
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- Suzuki, Motohiro (författare)
- Japan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan
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- Hirata, Yasuyuki (författare)
- Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan;Univ Tokyo, Dept Phys, Tokyo 1130033, Japan;Natl Def Acad Japan, Yokosuka, Kanagawa 2398686, Japan
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- Carva, Karel (författare)
- Charles Univ Prague, Fac Math & Phys, Dept Condensed Matter Phys, Ke Karlovu 5, Prague 12116, Czech Republic
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- Berritta, Marco (författare)
- Uppsala universitet,Materialteori
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- Takubo, Kou (författare)
- Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan;Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan
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- Uemura, Yohei (författare)
- Inst Mol Sci, Okazaki, Aichi 4448585, Japan;Paul Scherrer Inst, CH-5232 Villigen, Switzerland
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- Fukaya, Ryo (författare)
- High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan
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- Tanaka, Kenta (författare)
- Univ Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan
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- Nishimura, Wataru (författare)
- Univ Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan
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- Ohkochi, Takuo (författare)
- Japan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan
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- Katayama, Tetsuo (författare)
- Japan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan;RIKEN, SPring 8 Ctr, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan
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- Togashi, Tadashi (författare)
- Japan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan;RIKEN, SPring 8 Ctr, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan
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- Tamasaku, Kenji (författare)
- RIKEN, SPring 8 Ctr, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan
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- Yabashi, Makina (författare)
- Japan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan;RIKEN, SPring 8 Ctr, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan
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- Tanaka, Yoshihito (författare)
- Univ Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan
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- Seki, Takeshi (författare)
- Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan;Tohoku Univ, Ctr Spintron Res Network, Sendai, Miyagi 9808577, Japan
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- Takanashi, Koki (författare)
- Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan;Tohoku Univ, Ctr Spintron Res Network, Sendai, Miyagi 9808577, Japan
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- Oppeneer, Peter M. (författare)
- Uppsala universitet,Materialteori
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- Wadati, Hiroki (författare)
- Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan;Univ Tokyo, Dept Phys, Tokyo 1130033, Japan;Univ Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan
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(creator_code:org_t)
- 2019-12-12
- 2019
- Engelska.
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Ingår i: New Journal of Physics. - : IOP PUBLISHING LTD. - 1367-2630. ; 21:12
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Unraveling the origin of ultrafast demagnetization in multisublattice ferromagnetic materials requires femtosecond x-ray techniques to trace the magnetic moment dynamics on individual elements, but this could not yet be achieved in the hard x-ray regime. We demonstrate here the first ultrafast demagnetization dynamics in the ferromagnetic heavy 5d-transition metal Pt using circularly-polarized hard x-rays at an x-ray free electron laser (XFEL). The decay time of laser-induced demagnetization of L1(0)-FePt is determined to be tau(Pt) = 0.61 +/- 0.04 ps using time-resolved x-ray magnetic circular dichroism at the Pt L-3 edge, whereas magneto-optical Kerr measurements indicate the decay time for the total magnetization as tau(total) < 0.1 ps. A transient magnetic state with a photomodulated ratio of the 3d and 5d magnetic moments is demonstrated for pump-probe delays larger than 1 ps. We explain this distinct photo-modulated transient magnetic state by the induced-moment behavior of the Pt atom and the x-ray probing depth. Our findings pave the way for the future use of XFELs to disentangle atomic spin dynamics contributions.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- photo-induced magnetization dynamics
- time-resolved XMCD
- XFEL
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Yamamoto, Kohei
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Kubota, Yuya
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Suzuki, Motohiro
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Hirata, Yasuyuki
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Carva, Karel
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Berritta, Marco
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Takubo, Kou
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Uemura, Yohei
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Fukaya, Ryo
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Tanaka, Kenta
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Nishimura, Watar ...
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Ohkochi, Takuo
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Katayama, Tetsuo
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Togashi, Tadashi
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Tamasaku, Kenji
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Yabashi, Makina
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Tanaka, Yoshihit ...
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Seki, Takeshi
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Takanashi, Koki
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Oppeneer, Peter ...
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Wadati, Hiroki
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