TY - JOUR T1 - Magnetic frustration in the site ordered Mg3 Fe4 (V O4) 6 vanadate JF - Journal of Applied Physics Y1 - 2007 A1 - Guskos, N. A1 - V. Likodimos A1 - Glenis, S. A1 - Zolnierkiewicz, G. A1 - Typek, J. A1 - Szymczak, R. A1 - Blonska-Tabero, A. AB - The magnetic properties of the site ordered multicomponent vanadate Mg3 Fe4 (V O4) 6 are studied using dc magnetization and electron paramagnetic resonance (EPR) measurements. The static susceptibility shows antiferromagnetic interactions between Fe3+ spins with a Curie-Weiss temperature =-111 (1) K, while a transition to a spin-glass-like state is observed at T≈8.5 K, indicating appreciable spin frustration. EPR measurements corroborate the presence of antiferromagnetically coupled Fe3+ spins from high temperatures, while a distinct change in the temperature variation of the EPR parameters is observed at T<80 K, complying with the mean-field energy scale provided by the Curie-Weiss temperature of the system. The resulting magnetic inhomogeneity that persists despite the absence of cation disorder between magnetic and diamagnetic metal ions is attributed to the presence of small amounts of oxygen deficiency that modifies the connectivity and superexchange coupling between Fe3+ spins and leads to a disordered magnetic ground state. © 2007 American Institute of Physics. VL - 101 UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-34249883953&doi=10.1063%2f1.2740329&partnerID=40&md5=800e45006bafd1c2788707fb1fa56b9f N1 - cited By 18 ER -