公开(公告)号：DE3273164D1

公开(公告)日：1986-10-16

申请号：DE3273164

申请日：1982-06-22

Applicant: IBM

Inventor： TU KING NING ,  AHN KIE YEUNG ,  HERD SIGRID RENEE ,  LEE MICHAEL HEINO ,  WIEDER HAROLD ,  ONTON AARE

IPC: G11C17/00 ,  B41M5/26 ,  G11B7/243 ,  G11C13/04 ,  B41M5/24 ,  G03C1/72 ,  G11B7/00

公开(公告)号：DE3267119D1

公开(公告)日：1985-12-05

申请号：DE3267119

申请日：1982-05-14

Applicant: IBM

Inventor： ABOAF JOSEPH ADAM ,  KLOKHOLM ERIK ,  HERD SIGRID RENEE

IPC: G11B5/66 ,  C22C19/07 ,  G11B5/64 ,  H01F10/16 ,  H01F41/18

Abstract: This invention relates to a magnetic recording medium comprising a sputtered polycrystalline film of material having the formula CoxPty where x (Co) is up to 90 atomic percent of said material and y (Pt) is from 10 to 30 atomic of said material. The film has a magnetostriction value of from -35 x 10 to a value near substantially zero magnetostriction in the range of +/- 10 x 10 . The material has a coercivity Hc of from 500 to 2000 oersteds with a saturation magnetization of 400 gauss to 15,000 gauss.