Magnetic Compensation and Ordering in the Bimetallic Oxalates: Why Are the 2D and 3D Series so Different?

被引：19

作者：

Fishman, Randy S. ^{[1
]}

Clemente-Leon, Miguel ^{[2
,3
]}

Coronado, Eugenio ^{[2
]}

机构：

[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[2] Univ Valencia, Inst Ciencia Mol, Paterna 46980, Spain

[3] FGUV, Paterna 46980, Spain

来源：

INORGANIC CHEMISTRY | 2009年 / 48卷 / 07期

关键词：

MOLECULE-BASED MAGNETS; M-II; CHIRAL MAGNETS; SPIN-CROSSOVER; MIXED-VALENCY; FE; MN; OX; COMPLEX; CATIONS;

D O I：

10.1021/ic802341k

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Although the exchange coupling and local crystal-field environment are almost identical in the two-dimensional (2D) and three-dimensional (3D) series of bimetallic oxalates, those two classes of materials exhibit quite different magnetic properties. Using mean-field theory to treat the exchange interaction, we evaluate the transition temperatures and magnetizations of the 3D Fe(II)Fe(III) and Mn(II)Cr(III) bimetallic oxalates. Because of the tetrahedral coordination of the chiral anisotropy axis, the 3D bimetallic oxalates have lower transition temperatures than their 2D counterparts, and much stronger anisotropy is required to produce magnetic compensation in the 3D Fe(II)Fe(III) compounds. The spin-orbit coupling with the non-collinear orbital moments causes the spins to cant in both 3D compounds.

引用

页码：3039 / 3046

页数：8

共 39 条

[1] A molecular metal ferromagnet from the organic donor bis(ethylenedithio)tetraselenafulvalene and bimetallic oxalate complexes [J].

Alberola, A ;

Coronado, E ;

Galán-Mascarós, JR ;

Giménez-Saiz, C ;

Gómez-García, CJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (36) :10774-10775

[2] Molecular photochromic ferromagnetic based on the layered polymeric tris-oxalate of Cr(III), Mn(II) and 1-[(1′,3′,3′-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2′-indoline]-8-yl)methyl]pyridinium [J].

Aldoshin, S. M. ;

Sanina, N. A. ;

Minkin, V. I. ;

Voloshin, N. A. ;

Ikorskii, V. N. ;

Ovcharenko, V. I. ;

Smirnov, V. A. ;

Nagaeva, N. K. .

JOURNAL OF MOLECULAR STRUCTURE, 2007, 826 (2-3) :69-74

[3] Rational design of three-dimensional (3D) optically active molecule-based magnets:: Synthesis, structure, optical and, magnetic properties of {[Ru(bpy)3]2+, ClO4-, [MnIICrIII(ox)3]-}n and {[Ru(bpy)2ppy]+, [MIICrIII(ox)3]-}n, with MII = MnII, MnII.: X-ray structure of {[ΔRu(bpy)3]2+, ClO4-, [ΔMnIIΔCrIII(ox)3]-}n and {[ΛRu(bpy)2ppy]+, [ΔMnIIΛCrIII(ox)3]-}n [J].

Andrés, R ;

Brissard, M ;

Gruselle, M ;

Train, C ;

Vaissermann, J ;

Malézieux, B ;

Jamet, JP ;

Verdaguer, M .

INORGANIC CHEMISTRY, 2001, 40 (18) :4633-4640

[4] Enantioselective synthesis of optically active polymeric homo- and bimetallic oxalate-bridged networks [M2(ox)3]n [J].

Andrés, R ;

Gruselle, M ;

Malézieux, B ;

Verdaguer, M ;

Vaissermann, J .

INORGANIC CHEMISTRY, 1999, 38 (21) :4637-4646

[5] A photochromic molecule-based magnet [J].

Bénard, S ;

Rivière, E ;

Yu, P ;

Nakatani, K ;

Delouis, JF .

CHEMISTRY OF MATERIALS, 2001, 13 (01) :159-162

[6]

BERNARD S, 2000, J AM CHEM SOC, V122, P9444

[7]

Brissard M, 2001, EUR J INORG CHEM, P1745

[8] Polyfunctional two- (2D) and three- (3D) dimensional oxalate bridged bimetallic magnets [J].

Clément, R ;

Decurtins, S ;

Gruselle, M ;

Train, C .

MONATSHEFTE FUR CHEMIE, 2003, 134 (02) :117-135

[9]

Clemente-Leon M, UNPUB

[10] Insertion of a spin crossover FeIII complex into an oxalate-based layered material:: Coexistence of spin canting and spin crossover in a hybrid magnet [J].

Clemente-Leon, Miguel ;

Coronado, Eugeno ;

Carmen Gimenez-Lopez, M. ;

Soriano-Portillo, Alejandra ;

Waerenborgh, Joao C. ;

Delgado, Fernando S. ;

Ruiz-Perez, Catalina .

INORGANIC CHEMISTRY, 2008, 47 (19) :9111-9120

← 1 2 3 4 →