Tuning of superexchange couplings in a molecule-based ferroferrimagnet: (Ni(II)xMn(II)1-x)(1.5)[Cr-III(CN)(6)]

被引:57
作者
Ohkoshi, S
Sato, O
Iyoda, T
Fujishima, A
Hashimoto, K
机构
[1] KANAGAWA ACAD SCI & TECHNOL,ATSUGI,KANAGAWA 24302,JAPAN
[2] UNIV TOKYO,FAC ENGN,DEPT APPL CHEM,BUNKYO KU,TOKYO 113,JAPAN
关键词
D O I
10.1021/ic960978q
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
We have succeeded in controlling magnetic properties such as the saturation magnetization, the Weiss temperature and the coercive field using compounds in the series ((NixMn1-xII)-Mn-II)(1.5)[Cr-III(CN)(6)], by the strategy of choosing both ferromagnetic (J > 0) and antiferromagnetic (J < 0) exchange interactions by using the appropriate molar ratios of the transition metal ions. For a composition x = 0.38, the magnetization vs temperature curve exhibited negative magnetization. This type of magnetic behavior can be modeled using molecular field theory with three sublattice (Ni, Mn, Cr) sites.
引用
收藏
页码:268 / &
页数:3
相关论文
共 13 条
[1]   A ROOM-TEMPERATURE ORGANOMETALLIC MAGNET BASED ON PRUSSIAN BLUE [J].
FERLAY, S ;
MALLAH, T ;
OUAHES, R ;
VEILLET, P ;
VERDAGUER, M .
NATURE, 1995, 378 (6558) :701-703
[2]   HIGH-TC MOLECULAR-BASED MAGNETS - A FERROMAGNETIC BIMETALLIC CHROMIUM(III) NICKEL(II) CYANIDE WITH TC = 90-K [J].
GADET, V ;
MALLAH, T ;
CASTRO, I ;
VERDAGUER, M ;
VEILLET, P .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (23) :9213-9214
[3]  
Gatteschi D, 1991, Magnetic molecular materials
[4]  
GRIEBLER WD, 1982, Z NATURFORSCH B, V87, P832
[5]  
Kahn O., 1993, MOL MAGNETISM
[6]  
Ludi A., 1973, Structure and Bonding, V14, P1, DOI 10.1007/bfb0016869
[7]   HIGH-T(C) MOLECULAR-BASED MAGNETS - FERRIMAGNETIC MIXED-VALENCE CHROMIUM(III)-CHROMIUM(II) CYANIDES WITH T(C) AT 240-KELVIN AND 190-KELVIN [J].
MALLAH, T ;
THIEBAUT, S ;
VERDAGUER, M ;
VEILLET, P .
SCIENCE, 1993, 262 (5139) :1554-1557
[8]   ORGANIC AND ORGANOMETALLIC MOLECULAR MAGNETIC-MATERIALS - DESIGNER MAGNETS [J].
MILLER, JS ;
EPSTEIN, AJ .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1994, 33 (04) :385-415
[9]  
NEEL L, 1948, ANN PHYS-PARIS, V3, P137
[10]   Electrochemically tunable magnetic phase transition in a high-T-c chromium cyanide thin film [J].
Sato, O ;
Iyoda, T ;
Fujishima, A ;
Hashimoto, K .
SCIENCE, 1996, 271 (5245) :49-51