title: Metamagnetism and weak ferromagnetism in nickel (II) oxalate crystals.
abstract: Microcrystals of orthorhombic nickel (II) oxalate dihydrate were synthesized through a precipitation reaction of aqueous solutions of nickel chloride and oxalic acid. Magnetic susceptibility exhibits a sharp peak at 3.3 K and a broad rounded maximum near 43 K. We associated the lower maximum with a metamagnetic transition that occurs when the magnetic field is about ≥3.5 T. The maximum at 43 K is typical of 1D antiferromagnets, whereas weak ferromagnetism behavior was observed in the range of 3.3–43 K.
authors.affiliation: Instituto de Física, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico. evarotel@gmail.com
authors.forename: E
authors.initials: E
authors.lastname: Romero-Tela
authors.forename: M E
authors.initials: ME
authors.lastname: Mendoza
authors.forename: R
authors.initials: R
authors.lastname: Escudero