Photoinduced Faraday effect in a cobalt-iron polycyanide film

Abstract

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Magneto‐Optical Properties of Electrodeposited Thin Films of the Molecule‐Based Magnet Cr5.5(CN)12·11.5H2O

“…The Faraday effect has been observed in an electrochemically synthesized vanadium hexacyanochromate thin film with a magnetic ordering temperature T C = 345 K, as well as in other metal hexacyanochromate thin films prepared by the ion exchange method 5, 6. Photoinduced Faraday effects have been evidenced in a cobalt‐iron cyanide film 7. Also, MSHG has been detected in other Prussian blue thin films prepared by the electrochemical method, such as (Fe II x Cr II 1– x ) 3 [Cr III (CN) 6 ] 2 · z H 2 O 8, 9.…”

Spectroscopic investigation of the dynamical behavior of the photoinduced phase transition ofNa0.6Co1.3[Fe(CN)6

“…The Co-Fe cyanide film was prepared on a SnO 2 -coated glass according to the procedure described elsewhere. 18 With use of a superconducting quantum interfence device ͑SQUID͒ magnetometer, we have measured temperature dependence of the magnetic susceptibility M of the film. Figure 1͑a͒ shows temperature dependence of M T of the film, which is a crude measure for the effective spin moment.…”

“…The spectral profile of the PI phase ͑broken curve͒ resembles with that at 300 K in the HS phase ͑thin solid curve 17 ͒, indicating that PI phase has the same electronic configuration as the HS phase. 18…”

“…10 For example, Sato et al 6 reported enhancement of magnetization in K 0.14 Co͓Fe͑CN͒ 6 ͔ 0.71 • 4.93H 2 O by irradiation of a red light ͑660 nm͒ at 5 K and suppression of magnetization by irradiation of a blue light ͑450 nm͒ at 5 K. In addition, a thin films of Co-Fe cyanide, which is indispensable for a reliable transient absorption spectroscopy, can be grown on a SnO 2 -coated glass by the electrochemical reduction technique. [18][19][20] Thus, we have chosen the Co-Fe cyanide as a target material for the detailed investigation on the dynamical behavior of the PIPT.…”

Charge transfer processes in cyano‐bridged transition metals

“…The spectra commonly consist of a lower energy band centered at 2.4 eV and a higher energy band located above 3.0 eV. The lower-lying band for both the cyanides are ascribed to the charge transfer (CT) transition from Co II (or Mn II ) site to Fe II site [17,20]. On the other hand, the higher-lying band for both the cyanides are ascribed to the charge transfer from ligand CN − site to metal Fe III site (LMCT) [10,20-22, 24, 25].…”