title: New metal phthalocyanines/metal simple hydroxide multilayers: experimental evidence of dipolar field-driven magnetic behavior.
abstract: A series of new hybrid multilayers has been synthesized by insertion-grafting of transition metal (Cu(II), Co(II), Ni(II), and Zn(II)) tetrasulfonato phthalocyanines between layers of Cu(II) and Co(II) simple hydroxides. The structural and spectroscopic investigations confirm the formation of new layered hybrid materials in which the phthalocyanines act as pillars between the inorganic layers. The magnetic investigations show that all copper hydroxide-based compounds behave similarly, presenting an overall antiferromagnetic behavior with no ordering down to 1.8 K. On the contrary, the cobalt hydroxide-based compounds present a ferrimagnetic ordering around 6 K, regardless of the nature of the metal phthalocyanine between the inorganic layers. The latter observation points to strictly dipolar interactions between the inorganic layers. The amplitude of the dipolar field has been evaluated from X-band and Q-band EPR spectroscopy investigation (Bdipolar ≈ 30 mT).
authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 CNRS-Université de Strasbourg, and Labex NIE , 23 rue du Loess, BP 43, 67034 Strasbourg cedex 2, France.
authors.forename: Riadh
authors.initials: R
authors.lastname: Bourzami
authors.forename: Séraphin
authors.initials: S
authors.lastname: Eyele-Mezui
authors.forename: Emilie
authors.initials: E
authors.lastname: Delahaye
authors.forename: Marc
authors.initials: M
authors.lastname: Drillon
authors.forename: Pierre
authors.initials: P
authors.lastname: Rabu
authors.forename: Nathalie
authors.initials: N
authors.lastname: Parizel
authors.forename: Sylvie
authors.initials: S
authors.lastname: Choua
authors.forename: Philippe
authors.initials: P
authors.lastname: Turek
authors.forename: Guillaume
authors.initials: G
authors.lastname: Rogez