Magnetic Order in Quasi-Two Dimensional Molecular Magnet Cu(pz)_2(ClO_4)_2
Cu(pz)_2(ClO_4)_2 belongs to a family of pyrazine (pz) based molecular magnets found to produce two dimensional magnetic behavior with moderate exchange strengths (J = 10-20 K). Our characterization by susceptibility and isothermal magnetization studies indicate this system conforms to the 2D Heisen...
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Veröffentlicht in: | Bulletin of the American Physical Society 2004-03, Vol.49 (1) |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | Cu(pz)_2(ClO_4)_2 belongs to a family of pyrazine (pz) based molecular magnets found to produce two dimensional magnetic behavior with moderate exchange strengths (J = 10-20 K). Our characterization by susceptibility and isothermal magnetization studies indicate this system conforms to the 2D Heisenberg magnetic model at temperatures above 5 K. Using neutron diffraction we explore the magnetic ordering transition in Cu(pz)_2(ClO_4)_2 which occurs below 5 K. Our results show this systems exhibits antiferromagnetic order at T_N = 4.8 K, indicating the system is no longer in the 2D Heisenberg state. The details of this magnetic order, its relation to the 2D Heisenberg model, and perturbations which cause the ordering are discussed. |
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ISSN: | 0003-0503 |