title: Comment on 'Particle size dependent exchange bias and cluster-glass states in LaMn(0.7)Fe(0.3)O(3) '.
abstract: Thakur et al (2008 J. Phys.: Condens. Matter 20 195215) have recently reported magnetization hysteresis loops shifted along the field axis of the cluster-glass compound LaMn(0.7)Fe(0.3)O(3), attributed there to exchange bias induced at ferromagnetic/spin-glass-like interfaces. The present comment affirms that their results are insufficient for assigning the phenomenon solely to exchange bias since the corresponding field shift, if any, cannot be separated from that of a minor hysteresis loop of a ferromagnet, naturally displaced from the origin.
authors.affiliation: Instituto de Física, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, 91501-970 Rio Grande do Sul, Brazil.
authors.forename: J
authors.initials: J
authors.lastname: Geshev