| Autor: |
Saito, Shin, Sato, Yoshihiro, Hoshi, Fumikazu, Djayaprawira, David D., Takahashi, Migaku |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 5/15/2002 Part 1, 2 & 3, Vol. 91 Issue 10, p8351, 3p, 1 Chart, 4 Graphs |
| Abstrakt: |
The magnetic field determined from vanishing rotational hysteresis loss of CoCrPtB perpendicular thin film media was experimentally investigated. It was clarified that (1) in C0[sub 72]Cr[sub 16]Pt[sub 8]B[sub 4] media with d[sub mag] of less than 200 nm and Co[sub 64]Cr[sub 24]Pt[sub 8]B[sub 4] media with d[sub mag] of less than 100 nm, a homogeneous structure was realized, except for the existence of an initial growth region. (2) For both media, the perpendicular rotational hysteresis loss, W[sub r], the maximum field of W[sub r], H[sub p], and the field where W[sub r] = 0, H[sub W][sub r = 0], increased with an increase in d[sub mag]. (3) For both media, H[sub W][sub r = 0] / H[sup grain][sub k] increased with an increase in d[sub mag] and saturated at a magnitude of about 1. (4) For the medium with thin magnetic film thickness, at applied field of H[sub W[sub r = 0] < H < H[sup grain][sub k], a multidomain state was realized in the torque measurement in spite of no observation of loss of rotational hysteresis. This is considered to be due to the existence of thermal agitation between the multidomains. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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