title: Temperature oscillations of magnetization observed in nanofluid ferromagnetic graphite.
abstract: We report on unusual magnetic properties observed for nanofluid room temperature ferromagnetic graphite (with an average particle size of [Formula: see text] nm). More precisely, the measured magnetization exhibits a low temperature anomaly (attributed to the manifestation of finite size effects below the quantum temperature [Formula: see text]) as well as pronounced temperature oscillations above T = 50 K (attributed to manifestation of the hard-sphere type of pair correlations between ferromagnetic particles in the nanofluid).
authors.affiliation: Materials and Devices Group, Department of Physics and Physical Engineering, Universidade Federal de São Carlos, São Carlos, SP 13565-905, Brazil.
authors.forename: S
authors.initials: S
authors.lastname: Sergeenkov
authors.forename: N S
authors.initials: NS
authors.lastname: Souza
authors.forename: C
authors.initials: C
authors.lastname: Speglich
authors.forename: V A G
authors.initials: VA
authors.lastname: Rivera
authors.forename: C A
authors.initials: CA
authors.lastname: Cardoso
authors.forename: H
authors.initials: H
authors.lastname: Pardo
authors.forename: A W
authors.initials: AW
authors.lastname: Mombrú
authors.forename: F M
authors.initials: FM
authors.lastname: Araújo-Moreira