A molecular ferromagnet with a Curie temperature of 6.2 Kelvin: [Mn(C5(CH3)5)2] +[TCNQ]-

W. E. Broderick; J. A. Thompson; E. P. Day; B. M. Hoffman

doi:10.1126/science.249.4967.401

A molecular ferromagnet with a Curie temperature of 6.2 Kelvin: [Mn(C₅(CH₃)₅)₂] ⁺[TCNQ]^-

W. E. Broderick^*, J. A. Thompson, E. P. Day, B. M. Hoffman

^*Corresponding author for this work

Chemistry

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

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Abstract

The study of magnetic phase transitions in insulating molecular solids provides new insights into mechanisms of magnetic coupling in the solid state and into critical phenomena associated with these transitions. Only a few such materials are known to display cooperative magnetic properties. The use of high-spin molecular components would enhance intermolecular spin-spin interactions and thus a series of charge-transfer (CT) salts have been synthesized that utilize the spin S = 1 molecular cation, [Mn(C₅(CH₃)₅)₂]⁺ (decamethylmanganocenium). The structure and cooperative magnetic behavior of [Mn(C₅(CH₃)₅)₂] ⁺[TCNQ]^- (decamethylmanganocenium 7,7,8,8-tetracyano-p-quinodimethanide) are reported. This salt is a bulk molecular ferromagnet with the highest critical (Curie) temperature (T_c = 6.2 K) and coercive field (3.6 × 10³ gauss), yet reported for such a material.

Original language	English (US)
Pages (from-to)	401-403
Number of pages	3
Journal	Science
Volume	249
Issue number	4967
DOIs	https://doi.org/10.1126/science.249.4967.401
State	Published - Jul 27 1990

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@article{6e89e9b2678745bbaf69b1da9844078b,

title = "A molecular ferromagnet with a Curie temperature of 6.2 Kelvin: [Mn(C5(CH3)5)2] +[TCNQ]-",

abstract = "The study of magnetic phase transitions in insulating molecular solids provides new insights into mechanisms of magnetic coupling in the solid state and into critical phenomena associated with these transitions. Only a few such materials are known to display cooperative magnetic properties. The use of high-spin molecular components would enhance intermolecular spin-spin interactions and thus a series of charge-transfer (CT) salts have been synthesized that utilize the spin S = 1 molecular cation, [Mn(C5(CH3)5)2]+ (decamethylmanganocenium). The structure and cooperative magnetic behavior of [Mn(C5(CH3)5)2] +[TCNQ]- (decamethylmanganocenium 7,7,8,8-tetracyano-p-quinodimethanide) are reported. This salt is a bulk molecular ferromagnet with the highest critical (Curie) temperature (Tc = 6.2 K) and coercive field (3.6 × 103 gauss), yet reported for such a material.",

author = "Broderick, {W. E.} and Thompson, {J. A.} and Day, {E. P.} and Hoffman, {B. M.}",

year = "1990",

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doi = "10.1126/science.249.4967.401",

language = "English (US)",

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T1 - A molecular ferromagnet with a Curie temperature of 6.2 Kelvin

T2 - [Mn(C5(CH3)5)2] +[TCNQ]-

AU - Broderick, W. E.

AU - Thompson, J. A.

AU - Day, E. P.

AU - Hoffman, B. M.

PY - 1990/7/27

Y1 - 1990/7/27

N2 - The study of magnetic phase transitions in insulating molecular solids provides new insights into mechanisms of magnetic coupling in the solid state and into critical phenomena associated with these transitions. Only a few such materials are known to display cooperative magnetic properties. The use of high-spin molecular components would enhance intermolecular spin-spin interactions and thus a series of charge-transfer (CT) salts have been synthesized that utilize the spin S = 1 molecular cation, [Mn(C5(CH3)5)2]+ (decamethylmanganocenium). The structure and cooperative magnetic behavior of [Mn(C5(CH3)5)2] +[TCNQ]- (decamethylmanganocenium 7,7,8,8-tetracyano-p-quinodimethanide) are reported. This salt is a bulk molecular ferromagnet with the highest critical (Curie) temperature (Tc = 6.2 K) and coercive field (3.6 × 103 gauss), yet reported for such a material.

AB - The study of magnetic phase transitions in insulating molecular solids provides new insights into mechanisms of magnetic coupling in the solid state and into critical phenomena associated with these transitions. Only a few such materials are known to display cooperative magnetic properties. The use of high-spin molecular components would enhance intermolecular spin-spin interactions and thus a series of charge-transfer (CT) salts have been synthesized that utilize the spin S = 1 molecular cation, [Mn(C5(CH3)5)2]+ (decamethylmanganocenium). The structure and cooperative magnetic behavior of [Mn(C5(CH3)5)2] +[TCNQ]- (decamethylmanganocenium 7,7,8,8-tetracyano-p-quinodimethanide) are reported. This salt is a bulk molecular ferromagnet with the highest critical (Curie) temperature (Tc = 6.2 K) and coercive field (3.6 × 103 gauss), yet reported for such a material.

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ER -

A molecular ferromagnet with a Curie temperature of 6.2 Kelvin: [Mn(C₅(CH₃)₅)₂] ⁺[TCNQ]^-

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