Magnetic properties and optical control of electrochemically prepared iron-chromium polycyanides

Shin Ichi Ohkoshi, Yasuaki Einaga, Akira Fujishima, Kazuhito Hashimoto

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

The magnetic properties and photo-magnetic effects of the electrochemically prepared metal polycyanide film, Fe1.5II[CrIII(CN)6]·7.5H2O, were investigated. Magnetization measurements showed that it was a ferromagnet (parallel spin ordering) having a Tc = 21 K. The spontaneous magnetization decreased optically by the photoexcitation of the intervalence transfer (IT) band between FeII and CrIII. This optically reduced magnetization persisted for a period of several days at 5 K after turning off the light. 57Fe Moessbauer experiments showed that the spin state of iron did not change but the strength of a ferromagnetic interaction between FeII and CrIII decreased after the irradiation, forming a paramagnetic metastable state. This metastable state returned to the original state above 40 K, showing that the magnetization of this compound can be controlled reversibly by the combination of optical and thermal methods.

Original languageEnglish
Pages (from-to)245-249
Number of pages5
JournalJournal of Electroanalytical Chemistry
Volume473
Issue number1
DOIs
Publication statusPublished - 1999 Sep 8
Externally publishedYes

Fingerprint

Chromium
Magnetization
Magnetic properties
Iron
Photoexcitation
Metals
Irradiation
Experiments

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Magnetic properties and optical control of electrochemically prepared iron-chromium polycyanides. / Ohkoshi, Shin Ichi; Einaga, Yasuaki; Fujishima, Akira; Hashimoto, Kazuhito.

In: Journal of Electroanalytical Chemistry, Vol. 473, No. 1, 08.09.1999, p. 245-249.

Research output: Contribution to journalArticle

Ohkoshi, Shin Ichi ; Einaga, Yasuaki ; Fujishima, Akira ; Hashimoto, Kazuhito. / Magnetic properties and optical control of electrochemically prepared iron-chromium polycyanides. In: Journal of Electroanalytical Chemistry. 1999 ; Vol. 473, No. 1. pp. 245-249.
@article{818bbec0203f40aa82e9e1af8f4aa6e7,
title = "Magnetic properties and optical control of electrochemically prepared iron-chromium polycyanides",
abstract = "The magnetic properties and photo-magnetic effects of the electrochemically prepared metal polycyanide film, Fe1.5II[CrIII(CN)6]·7.5H2O, were investigated. Magnetization measurements showed that it was a ferromagnet (parallel spin ordering) having a Tc = 21 K. The spontaneous magnetization decreased optically by the photoexcitation of the intervalence transfer (IT) band between FeII and CrIII. This optically reduced magnetization persisted for a period of several days at 5 K after turning off the light. 57Fe Moessbauer experiments showed that the spin state of iron did not change but the strength of a ferromagnetic interaction between FeII and CrIII decreased after the irradiation, forming a paramagnetic metastable state. This metastable state returned to the original state above 40 K, showing that the magnetization of this compound can be controlled reversibly by the combination of optical and thermal methods.",
author = "Ohkoshi, {Shin Ichi} and Yasuaki Einaga and Akira Fujishima and Kazuhito Hashimoto",
year = "1999",
month = "9",
day = "8",
doi = "10.1016/S0022-0728(99)00173-4",
language = "English",
volume = "473",
pages = "245--249",
journal = "Journal of Electroanalytical Chemistry",
issn = "1572-6657",
publisher = "Elsevier Sequoia",
number = "1",

}

TY - JOUR

T1 - Magnetic properties and optical control of electrochemically prepared iron-chromium polycyanides

AU - Ohkoshi, Shin Ichi

AU - Einaga, Yasuaki

AU - Fujishima, Akira

AU - Hashimoto, Kazuhito

PY - 1999/9/8

Y1 - 1999/9/8

N2 - The magnetic properties and photo-magnetic effects of the electrochemically prepared metal polycyanide film, Fe1.5II[CrIII(CN)6]·7.5H2O, were investigated. Magnetization measurements showed that it was a ferromagnet (parallel spin ordering) having a Tc = 21 K. The spontaneous magnetization decreased optically by the photoexcitation of the intervalence transfer (IT) band between FeII and CrIII. This optically reduced magnetization persisted for a period of several days at 5 K after turning off the light. 57Fe Moessbauer experiments showed that the spin state of iron did not change but the strength of a ferromagnetic interaction between FeII and CrIII decreased after the irradiation, forming a paramagnetic metastable state. This metastable state returned to the original state above 40 K, showing that the magnetization of this compound can be controlled reversibly by the combination of optical and thermal methods.

AB - The magnetic properties and photo-magnetic effects of the electrochemically prepared metal polycyanide film, Fe1.5II[CrIII(CN)6]·7.5H2O, were investigated. Magnetization measurements showed that it was a ferromagnet (parallel spin ordering) having a Tc = 21 K. The spontaneous magnetization decreased optically by the photoexcitation of the intervalence transfer (IT) band between FeII and CrIII. This optically reduced magnetization persisted for a period of several days at 5 K after turning off the light. 57Fe Moessbauer experiments showed that the spin state of iron did not change but the strength of a ferromagnetic interaction between FeII and CrIII decreased after the irradiation, forming a paramagnetic metastable state. This metastable state returned to the original state above 40 K, showing that the magnetization of this compound can be controlled reversibly by the combination of optical and thermal methods.

UR - http://www.scopus.com/inward/record.url?scp=0033317774&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033317774&partnerID=8YFLogxK

U2 - 10.1016/S0022-0728(99)00173-4

DO - 10.1016/S0022-0728(99)00173-4

M3 - Article

AN - SCOPUS:0033317774

VL - 473

SP - 245

EP - 249

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

SN - 1572-6657

IS - 1

ER -