Thermal stability of CoCr films for perpendicular recording media

2000 ◽  
Vol 36 (5) ◽  
pp. 2468-2470 ◽  
Author(s):  
G. Bottoni ◽  
D. Candolfo ◽  
A. Cecchetti
Keyword(s):  
Thermal Stability ◽  
Recording Media ◽  
Perpendicular Recording ◽  
Thermal Stability Of

Thermal stability of written bits in double-layered perpendicular recording media

2002 ◽  
Vol 38 (5) ◽  
pp. 2036-2038 ◽  
Author(s):  
Y. Nakatani ◽  
N. Hayashi ◽  
Y. Uesaka ◽  
H. Fukushima
Keyword(s):  
Thermal Stability ◽  
Recording Media ◽  
Perpendicular Recording ◽  
Thermal Stability Of

Thermal stability in perpendicular recording media

2001 ◽  
Vol 235 (1-3) ◽  
pp. 273-280 ◽  
Author(s):  
Takehito Shimatsu ◽  
Hiroyuki Uwazumi ◽  
Hiroaki Muraoka ◽  
Yoshihisa Nakamura
Keyword(s):  
Thermal Stability ◽  
Recording Media ◽  
Perpendicular Recording

Effects of the Co-Presence of Conflicting Magnetic Anisotropy in Ba Ferrite Particles

2010 ◽  
Vol 67 ◽  
pp. 108-112
Author(s):  
Giancarlo Bottoni
Keyword(s):  
Thermal Stability ◽  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Low Temperatures ◽  
Magnetocrystalline Anisotropy ◽  
Shape Anisotropy ◽  
Recording Media ◽  
Magnetization Switching ◽  
Crystalline Anisotropy ◽  
Thermal Stability Of

In Ba ferrite particles magnetocrystalline and shape anisotropies are contemporarily present and conflicting. The strength and evolution of the two anisotropies are studied, through the dependence of the anisotropy constants on temperature. While in pure Ba ferrite particles the anisotropy is uniaxial at all temperatures, since the magnetocrystalline anisotropy clearly prevails on shape anisotropy, in particles modified for employment in recording media the two anisotropies are comparable and at low temperatures the shape anisotropy result stronger than the crystalline anisotropy. Besides the irregular shape of the particles introduces further preferred directions for the magnetization. The Co/Ti-doped particles show a multiple axes anisotropy. The macroscopic magnetic properties are found in relationship with the evolution of the anisotropy. Also the influence that the presence of such multiple anisotropy has on the magnetization switching and on the thermal stability of the magnetization of the Ba ferrite particles is analyzed.

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