Low temperature calorimetric and magnetic studies of copper(II) in 1,4-diazacycloheptane-copper(II) systems

Gul Dad Khattak; M. Sakhawat Hussain; P. H. Keesom; L. E. Wenger

doi:10.1016/0304-8853(88)90052-2

Low temperature calorimetric and magnetic studies of copper(II) in 1,4-diazacycloheptane-copper(II) systems

Gul Dad Khattak^*, M. Sakhawat Hussain, P. H. Keesom, L. E. Wenger

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

3 Scopus citations

Abstract

Low temperature specific heat and magnetic susceptibility studies were carried out on polycrystalline pellets of three copper(II) complexes of 1.4-diazacycloheptane having different geometries. Above 4 K, the specific heat can be described by the relation: C = αT³ which allows the determination of Debye temperatures for the investigated systems. Below 4 K, the specific heat rises very fast and goes through a maximum at T_max suggesting weak antiferromagnetic interactions. These findings are substantiated by the Curie-Weiss behavior in the ac susceptibility results and by the general features of the M vs. H curves.

Original language	English
Pages (from-to)	407-415
Number of pages	9
Journal	Journal of Magnetism and Magnetic Materials
Volume	75
Issue number	3
DOIs	https://doi.org/10.1016/0304-8853(88)90052-2
State	Published - 1 Dec 1988

Bibliographical note

Funding Information:
Support from the Cryogenic Facility of the KFUPM Physics Department, the KFUPM Research Committee (Grant PH/PHYSPROP/43) and from the KFUPM Chemistry Department are acknowledged. The research at the Wayne State University was supported by the National Science Foundation, Grant no. DMR-840071.

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Low temperature calorimetric and magnetic studies of copper(II) in 1,4-diazacycloheptane-copper(II) systems",

abstract = "Low temperature specific heat and magnetic susceptibility studies were carried out on polycrystalline pellets of three copper(II) complexes of 1.4-diazacycloheptane having different geometries. Above 4 K, the specific heat can be described by the relation: C = αT3 which allows the determination of Debye temperatures for the investigated systems. Below 4 K, the specific heat rises very fast and goes through a maximum at Tmax suggesting weak antiferromagnetic interactions. These findings are substantiated by the Curie-Weiss behavior in the ac susceptibility results and by the general features of the M vs. H curves.",

author = "Khattak, \{Gul Dad\} and Hussain, \{M. Sakhawat\} and Keesom, \{P. H.\} and Wenger, \{L. E.\}",

note = "Funding Information: Support from the Cryogenic Facility of the KFUPM Physics Department, the KFUPM Research Committee (Grant PH/PHYSPROP/43) and from the KFUPM Chemistry Department are acknowledged. The research at the Wayne State University was supported by the National Science Foundation, Grant no. DMR-840071.",

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doi = "10.1016/0304-8853(88)90052-2",

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T1 - Low temperature calorimetric and magnetic studies of copper(II) in 1,4-diazacycloheptane-copper(II) systems

AU - Khattak, Gul Dad

AU - Hussain, M. Sakhawat

AU - Keesom, P. H.

AU - Wenger, L. E.

N1 - Funding Information: Support from the Cryogenic Facility of the KFUPM Physics Department, the KFUPM Research Committee (Grant PH/PHYSPROP/43) and from the KFUPM Chemistry Department are acknowledged. The research at the Wayne State University was supported by the National Science Foundation, Grant no. DMR-840071.

PY - 1988/12/1

Y1 - 1988/12/1

N2 - Low temperature specific heat and magnetic susceptibility studies were carried out on polycrystalline pellets of three copper(II) complexes of 1.4-diazacycloheptane having different geometries. Above 4 K, the specific heat can be described by the relation: C = αT3 which allows the determination of Debye temperatures for the investigated systems. Below 4 K, the specific heat rises very fast and goes through a maximum at Tmax suggesting weak antiferromagnetic interactions. These findings are substantiated by the Curie-Weiss behavior in the ac susceptibility results and by the general features of the M vs. H curves.

AB - Low temperature specific heat and magnetic susceptibility studies were carried out on polycrystalline pellets of three copper(II) complexes of 1.4-diazacycloheptane having different geometries. Above 4 K, the specific heat can be described by the relation: C = αT3 which allows the determination of Debye temperatures for the investigated systems. Below 4 K, the specific heat rises very fast and goes through a maximum at Tmax suggesting weak antiferromagnetic interactions. These findings are substantiated by the Curie-Weiss behavior in the ac susceptibility results and by the general features of the M vs. H curves.

UR - https://www.scopus.com/pages/publications/0024138182

U2 - 10.1016/0304-8853(88)90052-2

DO - 10.1016/0304-8853(88)90052-2

M3 - Article

AN - SCOPUS:0024138182

SN - 0304-8853

VL - 75

SP - 407

EP - 415

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 3

ER -

Low temperature calorimetric and magnetic studies of copper(II) in 1,4-diazacycloheptane-copper(II) systems

Abstract

Bibliographical note

ASJC Scopus subject areas

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