Spin glass-like antiferromagnetic interactions in iron phosphate glasses

Glass formation from iron-rich phosphate melts

“…The glasses can dissolve large quantities of a variety of waste components while retaining outstanding chemical durability. Iron phosphate glasses also exhibit interesting electrical and magnetic properties that depend on the iron coordination number and redox state [9,10].…”

Preparation and magnetic properties of amorphous EuTiO3 thin films

“…Spin glass (SG)-like magnetic transition of oxide and fluoride glasses has been extensively investigated so far [1][2][3][4][5][6]. In most insulating oxide and fluoride glasses, short-range antiferromagnetic (AFM) superexchange interactions via anions are dominant, as demonstrated by the negative values of Weiss temperature (θ W ) [4][5][6]. The random distribution of magnetic ions, as well as the prevailing AFM interactions among magnetic ions, causes geometrical frustration in the alignment of magnetic moments at low temperatures, eventually leading to the SG transition.…”

Spin dynamics in oxide glass of Fe2O3–Bi2O3–B2O3 system

“…Several investigators reported that oxide glasses containing a large amount of magnetic ions show magnetic transitions as observed in spin glasses or superparamagnets [9][10][11]. Nonetheless, experiments have been little performed to clarify completely the mechanism of magnetic transition as well as the characteristics of magnetically ordered phase for those glasses derived from ionic compounds.…”