2002/05/28 by M. Evangelisti, Marco Evangelisti, J. Bartolome +4 · 2 citations
Materials Science · Physics and Astronomy · #Magnetism in coordination complexes #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat
paper · pdf · doi:10.1103/physrevb.66.144410
published as Phys. Rev. B 66, 144410 (2002) · 11 pages (revtex4) + 12 ps figures
arxiv created 2002/05/28 · openalex publication_date 2002/10/16 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We report on the magnetic properties of the supramolecular compound iron(II) phthalocyanine in its \ensuremathα form. dc- and ac-susceptometry measurements and M"ossbauer experiments show that the iron atoms are strongly magnetically coupled into ferromagnetic Ising chains with very weak antiferromagnetic interchain coupling. The transition to three-dimensional (3D) magnetic ordering below 10 K is hindered by the presence of impurities or other defects, by which the domain-wall arrangements along individual chains become gradually blocked/frozen, leading to a disordered 3D distribution of ferromagnetic chain segments. Below 5 K, field-cooled and zero-field-cooled magnetization measurements show strong irreversible behavior, attributed to pinning of the domain walls by the randomly distributed defects in combination with the interchain coupling. High-field magnetization experiments reveal a canted arrangement of the moments in adjacent ferromagnetic chains.