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Ultrafast demagneti...
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Yamamoto, KoheiUniv Tokyo, Inst Solid State Phys, Chiba 2778581, Japan;Univ Tokyo, Dept Phys, Tokyo 1130033, Japan;Inst Mol Sci, Okazaki, Aichi 4448585, Japan
(author)
Ultrafast demagnetization of Pt magnetic moment in L1(0)-FePt probed by magnetic circular dichroism at a hard x-ray free electron laser
- Article/chapterEnglish2019
Publisher, publication year, extent ...
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2019-12-12
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IOP PUBLISHING LTD,2019
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electronicrdacarrier
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LIBRIS-ID:oai:DiVA.org:uu-407454
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-407454URI
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https://doi.org/10.1088/1367-2630/ab5ac2DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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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.
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Kubota, YuyaJapan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan;RIKEN, SPring 8 Ctr, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan
(author)
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Suzuki, MotohiroJapan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan
(author)
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Hirata, YasuyukiUniv Tokyo, Inst Solid State Phys, Chiba 2778581, Japan;Univ Tokyo, Dept Phys, Tokyo 1130033, Japan;Natl Def Acad Japan, Yokosuka, Kanagawa 2398686, Japan
(author)
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Carva, KarelCharles Univ Prague, Fac Math & Phys, Dept Condensed Matter Phys, Ke Karlovu 5, Prague 12116, Czech Republic
(author)
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Berritta, MarcoUppsala universitet,Materialteori(Swepub:uu)marbe463
(author)
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Takubo, KouUniv Tokyo, Inst Solid State Phys, Chiba 2778581, Japan;Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan
(author)
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Uemura, YoheiInst Mol Sci, Okazaki, Aichi 4448585, Japan;Paul Scherrer Inst, CH-5232 Villigen, Switzerland
(author)
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Fukaya, RyoHigh Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan
(author)
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Tanaka, KentaUniv Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan
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Nishimura, WataruUniv Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan
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Ohkochi, TakuoJapan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan
(author)
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Katayama, TetsuoJapan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan;RIKEN, SPring 8 Ctr, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan
(author)
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Togashi, TadashiJapan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan;RIKEN, SPring 8 Ctr, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan
(author)
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Tamasaku, KenjiRIKEN, SPring 8 Ctr, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan
(author)
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Yabashi, MakinaJapan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan;RIKEN, SPring 8 Ctr, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan
(author)
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Tanaka, YoshihitoUniv Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan
(author)
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Seki, TakeshiTohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan;Tohoku Univ, Ctr Spintron Res Network, Sendai, Miyagi 9808577, Japan
(author)
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Takanashi, KokiTohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan;Tohoku Univ, Ctr Spintron Res Network, Sendai, Miyagi 9808577, Japan
(author)
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Oppeneer, Peter M.Uppsala universitet,Materialteori(Swepub:uu)peopp623
(author)
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Wadati, HirokiUniv 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
(author)
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Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan;Univ Tokyo, Dept Phys, Tokyo 1130033, Japan;Inst Mol Sci, Okazaki, Aichi 4448585, JapanJapan 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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In:New Journal of Physics: IOP PUBLISHING LTD21:121367-2630
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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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