Evidence of very high coercive fields in orthoferrite phases of PLD grown thin films

Schmool, DS Keller, N Guyot, M Krishnan, R Tessier, M

Ds. Schmool et al., Evidence of very high coercive fields in orthoferrite phases of PLD grown thin films, J MAGN MAGN, 195(2), 1999, pp. 291-298

6

INGLESE

Article

Apllied Physucs/Condensed Matter/Materiales Science

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

0304-8853 → ACNP

195

2

1999

291 - 298

ISI

0304-8853(199905)195:2<291:EOVHCF>2.0.ZU;2-4

Thin magnetic layers have been prepared by pulsed laser deposition (PLD) fr om targets of the orthoferrites: DyFeO3, GdFeO3 SmFeO3 and YFeO3. All layer s were deposited onto quartz substrates at 450 degrees C under oxygen parti al pressures ranging from 0 to 80 mTorr. The resulting layers display evide nce of various magnetic phases, including garnet and orthoferrite phases, a s evidenced by X-ray diffraction. The magnetic properties of the thin films have been analysed using SQUID and vibrating sample magnetometries. A simp le model is proposed to aid the analysis of hysteresis loops for samples of more than one magnetic phase. The orthoferrite phases display very high co ercive fields, in the range 1.5-1.8 T. (C) 1999 Elsevier Science B.V. All r ights reserved.