Further studies of memory switching in copper-calcium-phosphate glass devices

DC electrical conductivity of semiconducting cobalt–phosphate glasses

“…Studies of these glasses are interesting because of their semiconducting properties [1][2][3][4][5][6] and optical absorption in the visible, resulting in coloration of the glass [7]. These glasses attract much attention because of their memorizing and photoconducting properties [8][9][10][11]. They also find potential applications in solid-state lasers [12], luminescent solar energy concentrators (LCS) and optical fibers for communication devices [13][14][15][16][17].…”

The electrical properties of cadmium phosphate glasses at high electric fields

“…All the thin film samples were annealed at 200~ for about 2h before testing. A simple measuring circuit was used, similar to that described by Moridi and Hogarth [9]. For some experiments, smaU-area pressure contacts were used.…”

“…Structural changes in the switched regions of the glass samples were studied using a JEM 7 electron diffraction set following the technique described by Moridi and Hogarth [9] for CuOCaO-P2Os glasses. The accelerating voltage used was 80 kV.…”

“…The high-resistance state may be recovered by the application of a re-setting pulse of current higher than that previously flowing through the device. Drake et al [8] gave the first details of switching using a CuO-CaO-P2Os glass and more details of the switching properties of such a glass were given by Moridi and Hogarth [9] who showed the crystallization of the switched region of the glass and its restoration to a noncrystalline condition when re-set to the high- resistance state. Saji and Kao [10] have recently suggested that the filament formed by the application of a threshold voltage and leading to a threshold switching characteristic may consist of a mixture of amorphous and crystalline domains but the filament responsible for memory switching may consist of crystalline domains only as demonstrated by Moridi and Hogarth [9].…”

Optical and thermal properties of P2O5–Na2O–CaO–Al2O3:CoO glasses doped with transition metals

“…Glasses doped with transition metals also attract much attention because of their ability to memorize and photoconduct [15][16][17]. Moreover, they have the potential to be used in such applications as solid-state lasers [18], luminescent solar energy concentrators, and optical fibers for communication devices [19][20][21][22][23].…”