자기테이프용 Metal Powder의 초음파 분산에 의한 자기적 특성 향상에 관한 연구

김창곤; 최현승; 장학진; 윤석영; 김태옥; Chang-Gon Kim; Hyeon-Seung Choe; Hak-Jin Jang; Seok-Yeong Yun; Tae-Ok Kim

Korean Journal of Materials Research, Vol.11, No.11, 972-977, November, 2001

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자기테이프용 Metal Powder의 초음파 분산에 의한 자기적 특성 향상에 관한 연구

Study on Magnetic Property Enhancement of Metal Powders for Magnetic Tape by Using Ultrasonic Dispersion

김창곤, 최현승, 장학진, 윤석영 , 김태옥^†

부산대학교 공과대학 무기재료공학과

Chang-Gon Kim, Hyeon-Seung Choe, Hak-Jin Jang, Seok-Yeong Yun , and Tae-Ok Kim^†

Department of Inorganic Materials Engineering, Pusan National University, 30, Changjeon-Dong, Keumjeong-gu, Pusan 609-735, Korea

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It was investigated the effect of ultrasonic treatment on magnetic property of ultra fine magnetic Fe powders ( α -Fe) for magnetic tape. The properties were characterized with vibrating sample magnetometer (VSM), particle size analyzer (PSA) and scanning electron microscope (SEM). At 4hours ultrasonic treatment of 70 kHz, magnetic properties such as squareness ratio (S.Q. : 0.8868), orientation ratio (O.R. : 2.45) and switching field distribution (S.F. D. : 0.394) before taping were relatively enhanced. Cumulative particle size distribution of less than 5 μm fine powder was above 90% below 1 hour leaving time after ultrasonic treatment and it was supposed that ultrasonic treatment prevent aggregation. The magnetic values of S.Q. and S.F.D. of tape manufactured at 70 kHz and 4hour ultrasonic treatment were improved from 0.7747, 0.3818 to 0.8037, 0.3706, respectively. Electro-magnetic property used as in-output signal characteristic was improved, which showed that ultrasonic treatment developed the magnetic properties.

Keywords:ultrasonic dispersion;squareness ratio (S.Q.);orientation ratio (O.R.);switching field distribution (S.F.D.);electro-magnetic property

[References]

Camras M, Magnetic Recoarding Handbook, Van Nostrand Reinhold Company (1988) (1988)
Jorgensen F, The Complete Handbook of Magnetic Recording, McGraw-Hill (1996) (1996)
Kim CB, Proseedings of the 5th applied physics symposium on the magnetic materials and applications, Korean Physical Society, 115 (1990) (1990)
Goldman A, Handbook of Modern Ferromagnetic Materials, Kluwer Academic Publishers (1999) (1999)
Tagawa K, Matsunaga M, Ohshima K, Hiramatsu M, Ishibashi T, Mikami J, IEEE Trans. Magn., 22, 729 (1986)
Tateno Y, J. Magn. Magn. Mater., 231, 347 (2000)
Aoyama S, Kishimoto M, IEEE Trans. Magn., 27, 791 (1991)
Kishimoto M, Kitahata S, Amemiya M, IEEE Trans. Magn., 22, 732 (1986)
Chen J, Nikels DE, IEEE Trans. Magn., 32, 4478 (1996)
Newman JJ, IEEE Trans. Magn., 14, 886 (1778)
Mathur MCA, Hudson GF, Martin RJ, Mckinley WA, Hackett LD, IEEE Trans. Magn., 27, 4675 (1991)
Peng WG, Wong SS, Lin YS, Wu CD, IEEE Trans. Magn., 28, 2377 (1992)
Kim JH, Kim KH, J. Kor. Mag. Soc., 6, 21 (1996)
Kim JH, Kim KH, J. Kor. Mag. Soc., 6, 28 (1996)
Kim YH, Magnetism and Magnetic Materials, Pearson Education Korea (1997) (1997)
Kim SM, Kim TO, J. Kor. Mag. Soc., 6, 334 (1996)
Honda Y, Hirayama Y, Inaba N, Ito K, Futamoto M, IEEE Trans. Magn., 35, 2682 (1999)
Reed JA, Principle of Ceramic Processing, John wiley & Sons (1995) (1995)
Auweter H, Jachow H, Jakusch H, Schwab E, Veitch RJ, IEEE Trans. Magn., 27, 4669 (1991)
Kim SM, Kim TO, Sin HG, Yeo WS, J. Kor. Mag. Soc., 7, 314 (1997)
Veitch RJ, Held E, Jakusch H, Rner RK, IEEE Trans. Magn., 29, 3637 (1993)
Kodama N, J. Magn. Magn. Mater., 224, 113 (2001)

[Related Articles]

[1] Camras M, Magnetic Recoarding Handbook, Van Nostrand Reinhold Company (1988) (1988)

[2] Jorgensen F, The Complete Handbook of Magnetic Recording, McGraw-Hill (1996) (1996)

[3] Kim CB, Proseedings of the 5th applied physics symposium on the magnetic materials and applications, Korean Physical Society, 115 (1990) (1990)

[4] Goldman A, Handbook of Modern Ferromagnetic Materials, Kluwer Academic Publishers (1999) (1999)

[5] Tagawa K, Matsunaga M, Ohshima K, Hiramatsu M, Ishibashi T, Mikami J, IEEE Trans. Magn., 22, 729 (1986)

[6] Tateno Y, J. Magn. Magn. Mater., 231, 347 (2000)

[7] Aoyama S, Kishimoto M, IEEE Trans. Magn., 27, 791 (1991)

[8] Kishimoto M, Kitahata S, Amemiya M, IEEE Trans. Magn., 22, 732 (1986)

[9] Chen J, Nikels DE, IEEE Trans. Magn., 32, 4478 (1996)

[10] Newman JJ, IEEE Trans. Magn., 14, 886 (1778)

[11] Mathur MCA, Hudson GF, Martin RJ, Mckinley WA, Hackett LD, IEEE Trans. Magn., 27, 4675 (1991)

[12] Peng WG, Wong SS, Lin YS, Wu CD, IEEE Trans. Magn., 28, 2377 (1992)

[13] Kim JH, Kim KH, J. Kor. Mag. Soc., 6, 21 (1996)

[14] Kim JH, Kim KH, J. Kor. Mag. Soc., 6, 28 (1996)

[15] Kim YH, Magnetism and Magnetic Materials, Pearson Education Korea (1997) (1997)

[16] Kim SM, Kim TO, J. Kor. Mag. Soc., 6, 334 (1996)

[17] Honda Y, Hirayama Y, Inaba N, Ito K, Futamoto M, IEEE Trans. Magn., 35, 2682 (1999)

[18] Reed JA, Principle of Ceramic Processing, John wiley & Sons (1995) (1995)

[19] Auweter H, Jachow H, Jakusch H, Schwab E, Veitch RJ, IEEE Trans. Magn., 27, 4669 (1991)

[20] Kim SM, Kim TO, Sin HG, Yeo WS, J. Kor. Mag. Soc., 7, 314 (1997)

[21] Veitch RJ, Held E, Jakusch H, Rner RK, IEEE Trans. Magn., 29, 3637 (1993)

[22] Kodama N, J. Magn. Magn. Mater., 224, 113 (2001)