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 › peer-review

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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@article{2faec7df30a94ec4bc27f12b39bf2bb2,

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.}",

note = "Funding Information: This work was supported by the National Science Foundation through the Solid State Chemistry program, grant No. DMR8116804, and the NSF-MRL program, grant No. DMR8216972, to the Northwestern University Materials Research Center.",

year = "1987",

month = mar,

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

language = "English (US)",

volume = "19",

pages = "781--785",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier BV",

number = "1-3",

}

Magnetic transitions in a molecular metal with embedded local moments : Cu(pc)I. / Ogawa, Michael Y.; Palmer, Sharon M.; Martinsen, Jens; Stanton, Judith L.; Hoffman, Brian M.; Ibers, James A.; Lee, Soonchil; Yudkowsky, Michael; Halperin, William P.

In: Synthetic Metals, Vol. 19, No. 1-3, 03.1987, p. 781-785.

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

TY - JOUR

T1 - Magnetic transitions in a molecular metal with embedded local moments

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.

N1 - Funding Information: This work was supported by the National Science Foundation through the Solid State Chemistry program, grant No. DMR8116804, and the NSF-MRL program, grant No. DMR8216972, to the Northwestern University Materials Research Center.

PY - 1987/3

Y1 - 1987/3

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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JO - Synthetic Metals

JF - Synthetic Metals

SN - 0379-6779

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ER -

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

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