Magnetic transitions in a molecular metal with embedded local moments: Cu(pc)I

Michael Y. Ogawa; Sharon M. Palmer; Jens Martinsen; Judith L. Stanton; Brian M. Hoffman; James A. Ibers; Soonchil Lee; Michael Yudkowsky; William P. Halperin

doi:10.1016/0379-6779(87)90452-8

Magnetic transitions in a molecular metal with embedded local moments: Cu(pc)I

Michael Y. Ogawa^*, Sharon M. Palmer, Jens Martinsen, Judith L. Stanton, Brian M. Hoffman, James A. Ibers, Soonchil Lee, Michael Yudkowsky, William P. Halperin

^*Corresponding author for this work

Research output: Contribution to journal › Article

3 Scopus citations

Abstract

We discuss the low temperature magnetic properties of (phthalocyaninato)-copper(II) iodide (Cu(pc)I). This molecular metal contains conductive stacks that incorporate a one-dimensional array of local Cu⁺² moments strongly coupled to conduction electrons. Below 20K, the EPR g-value of the coupled spin system increases anomalously and at 8K the EPR signal broadens abruptly and becomes unobservable. Anomalies in the proton NMR spin-lattice relaxation times are observed at the transition temperature. Preliminary EPR experiments conducted on a newly synthesized series of materials, Cu_xNi_1-x(pc)I, indicate the existence of a similar low temperature transition in the presence of various concentrations of loca moments.

Original language	English (US)
Pages (from-to)	781-785
Number of pages	5
Journal	Synthetic Metals
Volume	19
Issue number	1-3
DOIs	https://doi.org/10.1016/0379-6779(87)90452-8
State	Published - Mar 1987

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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Ogawa, M. Y., Palmer, S. M., Martinsen, J., Stanton, J. L., Hoffman, B. M., Ibers, J. A., Lee, S., Yudkowsky, M., & Halperin, W. P. (1987). Magnetic transitions in a molecular metal with embedded local moments: Cu(pc)I. Synthetic Metals, 19(1-3), 781-785. https://doi.org/10.1016/0379-6779(87)90452-8

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title = "Magnetic transitions in a molecular metal with embedded local moments: Cu(pc)I",

abstract = "We discuss the low temperature magnetic properties of (phthalocyaninato)-copper(II) iodide (Cu(pc)I). This molecular metal contains conductive stacks that incorporate a one-dimensional array of local Cu+2 moments strongly coupled to conduction electrons. Below 20K, the EPR g-value of the coupled spin system increases anomalously and at 8K the EPR signal broadens abruptly and becomes unobservable. Anomalies in the proton NMR spin-lattice relaxation times are observed at the transition temperature. Preliminary EPR experiments conducted on a newly synthesized series of materials, CuxNi1-x(pc)I, indicate the existence of a similar low temperature transition in the presence of various concentrations of loca moments.",

author = "Ogawa, {Michael Y.} and Palmer, {Sharon M.} and Jens Martinsen and Stanton, {Judith L.} and Hoffman, {Brian M.} and Ibers, {James A.} and Soonchil Lee and Michael Yudkowsky and Halperin, {William P.}",

year = "1987",

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doi = "10.1016/0379-6779(87)90452-8",

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T2 - Cu(pc)I

AU - Ogawa, Michael Y.

AU - Palmer, Sharon M.

AU - Martinsen, Jens

AU - Stanton, Judith L.

AU - Hoffman, Brian M.

AU - Ibers, James A.

AU - Lee, Soonchil

AU - Yudkowsky, Michael

AU - Halperin, William P.

PY - 1987/3

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N2 - We discuss the low temperature magnetic properties of (phthalocyaninato)-copper(II) iodide (Cu(pc)I). This molecular metal contains conductive stacks that incorporate a one-dimensional array of local Cu+2 moments strongly coupled to conduction electrons. Below 20K, the EPR g-value of the coupled spin system increases anomalously and at 8K the EPR signal broadens abruptly and becomes unobservable. Anomalies in the proton NMR spin-lattice relaxation times are observed at the transition temperature. Preliminary EPR experiments conducted on a newly synthesized series of materials, CuxNi1-x(pc)I, indicate the existence of a similar low temperature transition in the presence of various concentrations of loca moments.

AB - We discuss the low temperature magnetic properties of (phthalocyaninato)-copper(II) iodide (Cu(pc)I). This molecular metal contains conductive stacks that incorporate a one-dimensional array of local Cu+2 moments strongly coupled to conduction electrons. Below 20K, the EPR g-value of the coupled spin system increases anomalously and at 8K the EPR signal broadens abruptly and becomes unobservable. Anomalies in the proton NMR spin-lattice relaxation times are observed at the transition temperature. Preliminary EPR experiments conducted on a newly synthesized series of materials, CuxNi1-x(pc)I, indicate the existence of a similar low temperature transition in the presence of various concentrations of loca moments.

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