Weak-ferromagnetism in molecular magnets based on transition metal complexes of crown thioether

Junichi Nishijo; Akira Miyazaki; Toshiaki Enoki

doi:10.1016/S0277-5387(03)00155-4

Weak-ferromagnetism in molecular magnets based on transition metal complexes of crown thioether

Junichi Nishijo^*, Akira Miyazaki, Toshiaki Enoki

^*Corresponding author for this work

Applied Chemistry

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

A new class of molecular based magnets M(9S3)₂[Ni(bdt)₂]₂ (M = Ni, Co) consisting of transition metal complex of crown thioether show weak-ferromagnetic transitions at T_N = 6.2 and 2.6 K for M = Ni and Co, respectively, accompanied by remanent magnetizations 0.2μ_B and 0.01μ_B with coercive forces 200 and 10 Oe. M(9S3)₂²⁺ cations (S = 1 and 1/2 for M = Ni and Co, respectively), and a half of Ni(bdt)₂^- (S = 1/2) anions form alternate antiferromagnetic (AF) chains (#1), while the other half of Ni(bdt)₂^- anions form uniform AF chains (#2). These two type of chains are connected to each other by two weak AF interactions; interaction between Ni(bdt)₂^- in #1 and Ni(bdt)₂^- in #2, and interaction between M(9S3)₂²⁺ in #1 and Ni(bdt)₂^- in the adjacent chain #1. A competition between these two AF interactions causes canted spin configuration, giving rise to weak-ferromagnetism.

Original language	English
Pages (from-to)	1755-1758
Number of pages	4
Journal	Polyhedron
Volume	22
Issue number	14-17
DOIs	https://doi.org/10.1016/S0277-5387(03)00155-4
State	Published - 2003/07/15

Keywords

Benzene dithiolate
Crown thioether
Ferrimagnet
Molecular based magnet
Transition metal complex
Weak-ferromagnetism

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/S0277-5387(03)00155-4

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title = "Weak-ferromagnetism in molecular magnets based on transition metal complexes of crown thioether",

abstract = "A new class of molecular based magnets M(9S3)2[Ni(bdt)2]2 (M = Ni, Co) consisting of transition metal complex of crown thioether show weak-ferromagnetic transitions at TN = 6.2 and 2.6 K for M = Ni and Co, respectively, accompanied by remanent magnetizations 0.2μB and 0.01μB with coercive forces 200 and 10 Oe. M(9S3)22+ cations (S = 1 and 1/2 for M = Ni and Co, respectively), and a half of Ni(bdt)2- (S = 1/2) anions form alternate antiferromagnetic (AF) chains (#1), while the other half of Ni(bdt)2- anions form uniform AF chains (#2). These two type of chains are connected to each other by two weak AF interactions; interaction between Ni(bdt)2- in #1 and Ni(bdt)2- in #2, and interaction between M(9S3)22+ in #1 and Ni(bdt)2- in the adjacent chain #1. A competition between these two AF interactions causes canted spin configuration, giving rise to weak-ferromagnetism.",

keywords = "Benzene dithiolate, Crown thioether, Ferrimagnet, Molecular based magnet, Transition metal complex, Weak-ferromagnetism",

author = "Junichi Nishijo and Akira Miyazaki and Toshiaki Enoki",

year = "2003",

month = jul,

day = "15",

doi = "10.1016/S0277-5387(03)00155-4",

language = "英語",

volume = "22",

pages = "1755--1758",

journal = "Polyhedron",

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number = "14-17",

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TY - JOUR

T1 - Weak-ferromagnetism in molecular magnets based on transition metal complexes of crown thioether

AU - Nishijo, Junichi

AU - Miyazaki, Akira

AU - Enoki, Toshiaki

PY - 2003/7/15

Y1 - 2003/7/15

N2 - A new class of molecular based magnets M(9S3)2[Ni(bdt)2]2 (M = Ni, Co) consisting of transition metal complex of crown thioether show weak-ferromagnetic transitions at TN = 6.2 and 2.6 K for M = Ni and Co, respectively, accompanied by remanent magnetizations 0.2μB and 0.01μB with coercive forces 200 and 10 Oe. M(9S3)22+ cations (S = 1 and 1/2 for M = Ni and Co, respectively), and a half of Ni(bdt)2- (S = 1/2) anions form alternate antiferromagnetic (AF) chains (#1), while the other half of Ni(bdt)2- anions form uniform AF chains (#2). These two type of chains are connected to each other by two weak AF interactions; interaction between Ni(bdt)2- in #1 and Ni(bdt)2- in #2, and interaction between M(9S3)22+ in #1 and Ni(bdt)2- in the adjacent chain #1. A competition between these two AF interactions causes canted spin configuration, giving rise to weak-ferromagnetism.

AB - A new class of molecular based magnets M(9S3)2[Ni(bdt)2]2 (M = Ni, Co) consisting of transition metal complex of crown thioether show weak-ferromagnetic transitions at TN = 6.2 and 2.6 K for M = Ni and Co, respectively, accompanied by remanent magnetizations 0.2μB and 0.01μB with coercive forces 200 and 10 Oe. M(9S3)22+ cations (S = 1 and 1/2 for M = Ni and Co, respectively), and a half of Ni(bdt)2- (S = 1/2) anions form alternate antiferromagnetic (AF) chains (#1), while the other half of Ni(bdt)2- anions form uniform AF chains (#2). These two type of chains are connected to each other by two weak AF interactions; interaction between Ni(bdt)2- in #1 and Ni(bdt)2- in #2, and interaction between M(9S3)22+ in #1 and Ni(bdt)2- in the adjacent chain #1. A competition between these two AF interactions causes canted spin configuration, giving rise to weak-ferromagnetism.

KW - Benzene dithiolate

KW - Crown thioether

KW - Ferrimagnet

KW - Molecular based magnet

KW - Transition metal complex

KW - Weak-ferromagnetism

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U2 - 10.1016/S0277-5387(03)00155-4

DO - 10.1016/S0277-5387(03)00155-4

M3 - 学術論文

AN - SCOPUS:0042872587

SN - 0277-5387

VL - 22

SP - 1755

EP - 1758

JO - Polyhedron

JF - Polyhedron

IS - 14-17

ER -

Weak-ferromagnetism in molecular magnets based on transition metal complexes of crown thioether

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Keywords

ASJC Scopus subject areas

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