Pressure-induced electron transfer in ferrimagnetic Prussian blue analogs -: art. no. 024415

被引：91

作者：

Ksenofontov, V

Levchenko, G

Reiman, S

Gütlich, P

Bleuzen, A

Escax, V

Verdaguer, M

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Anorgan Chem & Analyt Chem, D-55099 Mainz, Germany

[2] Univ Paris 06, CNRS, U7071, Lab Chim Inorgan & Mat Mol, F-75252 Paris 05, France

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.68.024415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mossbauer and magnetic susceptibility measurements were performed under pressure on three Prussian blue analogs, K(0.1)Co(4)[Fe(CN)(6)](2.7).18H(2)O, K(0.28)Co(4)[Fe(CN)(6)](2.76).18H(2)O, and Cs(0.7)Co(4)[Fe(CN)(6)](2.9).16H(2)O. A pressure-induced electron transfer Co(2+)(S=3/2)Fe(3+)(S=1/2) --> Co(3+)(S=0)-Fe(2+)(S=0) was found. The "scanning" of the ligand field strength by applying an external hydrostatic pressure allows the exploration of the distribution of CoN(n)O(6-n) (0less than or equal tonless than or equal to6) configurations. It reveals a narrow distribution of configurations centered around the most probable CoN(4)O(2) configuration in K(0.1)Co(4)[Fe(CN)(6)](2.7).18H2(O) and a broad CoN(n)O(6-n) distribution in K(0.28)Co(4)[Fe(CN)(6)](2.76).18H(2)O and Cs(0.7)Co(4)[Fe(CN)(6)](2.9).16H(2)O. This evolution of site distribution caused by alkali doping, explored here for the first time, to our knowledge is shown to play an important role in the photoinduced magnetization process.

引用

页数：6

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