title: Direct probing of spin state dynamics coupled with electronic and structural modifications by picosecond time-resolved XAFS.
abstract: The first direct observation of the transient spin-state in a disordered magnetic system with time-resolved XAFS is reported. By observing the evolution of the Fe(II) 1s-3d transition, the spin crossover transition from the (1)A(1) low spin state to (5)T(2) high spin state has been directly observed on a picosecond time scale. Moreover, observation of the transient spin state with time-resolved XAFS allows for the investigation of the variations in the electronic state and molecular structure. This unique experimental technique probes the excited states involved in the ultrafast photoinduced reactions in disordered magnetic systems.
authors.affiliation: ERATO, Japan Science and Technology Agency, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan. noz@post.kek.jp
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Nozawa
authors.forename: Tokushi
authors.initials: T
authors.lastname: Sato
authors.forename: Matthieu
authors.initials: M
authors.lastname: Chollet
authors.forename: Kouhei
authors.initials: K
authors.lastname: Ichiyanagi
authors.forename: Ayana
authors.initials: A
authors.lastname: Tomita
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Fujii
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Adachi
authors.forename: Shin-ya
authors.initials: SY
authors.lastname: Koshihara
mesh_terms: D004583:Electrons; D008280:Magnetics; D009942:Organometallic Compounds / Q000737:chemistry; D013997:Time Factors; D056928:X-Ray Absorption Spectroscopy
chemical_list: D009942:Organometallic Compounds