Recording performance of CoCrPt-(Ta, B)/TiCr perpendicular recording media
The magnetic properties, microstructure and the recording performances of CoCrPt-(Ta, B)/TiCr perpendicular magnetic recording media were studied in conjunction with the effect of thermal agitation. The addition of Ta or B to CoCrPt media significantly improves its low noise performance, mainly due...
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| Veröffentlicht in: | IEEE transactions on magnetics 2001-07, Vol.37 (4), p.1595-1598 |
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| container_title | IEEE transactions on magnetics |
| container_volume | 37 |
| creator | Uwazumi, H. Shimatsu, T. Sakai, Y. Otsuki, A. Watanabe, I. Muraoka, H. Nakamura, Y. |
| description | The magnetic properties, microstructure and the recording performances of CoCrPt-(Ta, B)/TiCr perpendicular magnetic recording media were studied in conjunction with the effect of thermal agitation. The addition of Ta or B to CoCrPt media significantly improves its low noise performance, mainly due to the reduction of grain size and intergranular magnetic interactions. However, adding Ta or B also reduces the value of perpendicular magnetic anisotropy, K/sub u/, especially in the initial growth layer, resulting in the degradation of thermal stability. In order to achieve high thermal stability without degrading the low noise performance of these media, an M/sub r//M/sub g/ value of nearly 1.0 is required. This may be achieved by suppressing of the reduction of K/sub u/ and the reducing intergranular magnetic interactions, whilst maintaining their small grain size. |
| doi_str_mv | 10.1109/20.950911 |
| format | Article |
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The addition of Ta or B to CoCrPt media significantly improves its low noise performance, mainly due to the reduction of grain size and intergranular magnetic interactions. However, adding Ta or B also reduces the value of perpendicular magnetic anisotropy, K/sub u/, especially in the initial growth layer, resulting in the degradation of thermal stability. In order to achieve high thermal stability without degrading the low noise performance of these media, an M/sub r//M/sub g/ value of nearly 1.0 is required. 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The addition of Ta or B to CoCrPt media significantly improves its low noise performance, mainly due to the reduction of grain size and intergranular magnetic interactions. However, adding Ta or B also reduces the value of perpendicular magnetic anisotropy, K/sub u/, especially in the initial growth layer, resulting in the degradation of thermal stability. In order to achieve high thermal stability without degrading the low noise performance of these media, an M/sub r//M/sub g/ value of nearly 1.0 is required. This may be achieved by suppressing of the reduction of K/sub u/ and the reducing intergranular magnetic interactions, whilst maintaining their small grain size.</description><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Degradation</subject><subject>Exact sciences and technology</subject><subject>Grain size</subject><subject>Low noise</subject><subject>Magnetic anisotropy</subject><subject>Magnetic noise</subject><subject>Magnetic properties</subject><subject>Magnetic properties and materials</subject><subject>Magnetic recording materials</subject><subject>Magnetism</subject><subject>Media</subject><subject>Microstructure</subject><subject>Noise reduction</subject><subject>Perpendicular magnetic anisotropy</subject><subject>Perpendicular magnetic recording</subject><subject>Physics</subject><subject>Recording</subject><subject>Reduction</subject><subject>Studies of specific magnetic materials</subject><subject>Tantalum</subject><subject>Thermal degradation</subject><subject>Thermal stability</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNqF0UtLw0AQB_BFFKyPg1dPQfBRMDqT7POowSeCIvUcNpuJpKRJ3W0OfntTWhQ86GkZ9jd_mBnGDhAuEMFcJnBhBBjEDTZCwzEGkGaTjQBQx4ZLvs12QpgOJRcII_b4Sq7zZd2-R3PyVedntnUUdVWUdZl_WcRnE3seXY8vJ3Xml2RObVm7vrE-8t-tMypru8e2KtsE2l-_u-zt9maS3cdPz3cP2dVT7EQqF3HBQRZVJXSRSmWVUYBOFJyUQeC6qEAQh0InlhyUVgmNSDaV3CWJSowq0112usqd--6jp7DIZ3Vw1DS2pa4PuUEuZZoCDvLkT5lowYU04n8oDSoB6QCPfsFp1_t2GDfXmmtUiHpA4xVyvgvBU5XPfT2z_jNHyJdXyhPIV1ca7PE60AZnm8oP66_DTwMHo6WSgztcuZqIvr_XIV-0Z5Xr</recordid><startdate>20010701</startdate><enddate>20010701</enddate><creator>Uwazumi, H.</creator><creator>Shimatsu, T.</creator><creator>Sakai, Y.</creator><creator>Otsuki, A.</creator><creator>Watanabe, I.</creator><creator>Muraoka, H.</creator><creator>Nakamura, Y.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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The addition of Ta or B to CoCrPt media significantly improves its low noise performance, mainly due to the reduction of grain size and intergranular magnetic interactions. However, adding Ta or B also reduces the value of perpendicular magnetic anisotropy, K/sub u/, especially in the initial growth layer, resulting in the degradation of thermal stability. In order to achieve high thermal stability without degrading the low noise performance of these media, an M/sub r//M/sub g/ value of nearly 1.0 is required. This may be achieved by suppressing of the reduction of K/sub u/ and the reducing intergranular magnetic interactions, whilst maintaining their small grain size.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/20.950911</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record> |
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| source | IEEE Electronic Library (IEL) |
| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Degradation Exact sciences and technology Grain size Low noise Magnetic anisotropy Magnetic noise Magnetic properties Magnetic properties and materials Magnetic recording materials Magnetism Media Microstructure Noise reduction Perpendicular magnetic anisotropy Perpendicular magnetic recording Physics Recording Reduction Studies of specific magnetic materials Tantalum Thermal degradation Thermal stability |
| title | Recording performance of CoCrPt-(Ta, B)/TiCr perpendicular recording media |
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