Single Crystal Magnetic Study on Ferromagnetic Manganese (II) Phthalocyanine.

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Abstract:

A magnetic study has been carried out in the temperature range 1.2-25 K and magnetic field range 0 to 50 kOe on single crystals of manganese II phthalocyanine. At higher temperatures the magnetic properties of manganese II phthalocyanine exhibit chain-like characteristics which may be understood in terms of ferromagnetic Heisenberg intrachain exchange of S 32 ions with a weak antiferromagnetic interchain interaction. In the ordered state, Tc, 8.3 K, MnPc is a canted ferromagnet with easy axes of magnetization being along X1 and X3 directions. A zero-field splitting of the single ion 4A2 state of the manganese II ion gives rise to canted ferromagnetism which does not show complete saturation at the high field range of these experiments 50 kOe. The spin structure of manganese II phthalocyanine at low temperature is discussed. Author

Author(s):
Mitra, Samaresh ; Gregson, A. K. ; Hatfield, William E. ; Weller, Robert R.
Author Organization(s):
NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF CHEMISTRY
Descriptive Note:
Interim technical rept.,
Pagination:
0030

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-19
Contract/Grant Number(s):
N00014-76-C-0816
 Subject Terms
Joint Capability Areas:
JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_1.2.3_Educating
Communities of Interest:
Air Platforms
Descriptor(s):
*SINGLE CRYSTALS, *PHTHALOCYANINES, *FERROMAGNETIC MATERIALS, *FERROMAGNETISM, *MANGANESE, IONS, MEASUREMENT, LOW TEMPERATURE, MAGNETIC FIELDS, INTERACTIONS, CRYSTAL LATTICES, ELECTRONIC STATES, ANISOTROPY, MOLECULAR STRUCTURE, MAGNETIZATION, MAGNETS, SPIN STATES, MOLECULAR ORBITALS
Field(s)/Group(s):
Organic Chemistry, Crystallography, Electricity and Magnetism
Keyword(s):
Ferromagnets, WUNR053617
Report Date:
1982 Dec 01