Photochromism induced magnetization changes in Prussian Blue ultrathin films fabricated into the Langmuir-Blodgett films composed of an amphiphilic azobenzene and a deoxyribonucleic acid

Takashi Yamamoto, Yasushi Umemura, Masaru Nakagawa, Tomokazu Iyoda, Yasuaki Einaga

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A photomagnetic ultrathin film consisting of an azobenzene, a deoxyribonucleic acid, and Prussian Blue has been fabricated by the Langmuir-Blodgett method. Prussian Blue layers in the films were a two-dimensional structure with the height of 50 Å and the average coherence length of 210 Å. Reversible photoisomerization of the azobenzenes was observed even in the films. The films exhibit the long-range ferromagnetic order below 4.2 K and moreover, upon photoillumination at 2 K, reversible changes in the magnetization were realized with the value of ca. 1.0%. This photoswitching in the magnetization is due to changes in the electrostatic field induced by photoisomerization.

Original languageEnglish
Pages (from-to)5476-5483
Number of pages8
JournalThin Solid Films
Volume515
Issue number13
DOIs
Publication statusPublished - 2007 May 7

Keywords

  • Langmuir-Blodgett Films
  • Organic-inorganic composite
  • Photochromism
  • Photomagnet

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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