Magnetization reversal, coercivity, and the process of thermomagnetic recording in thin films of amorphous rare earth--transition metal alloys

Journal Article · Sun Feb 15 04:00:00 EST 1987 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.338094· OSTI ID:6811088

Mansuripur, M

A model is proposed for the mechanism of magnetization reversal in thin films of amorphous alloys with perpendicular magnetic anisotropy. Examples of these alloys are TbFe, GdCo, DyFe, and GdTbFeCo, which are currently under investigation as storage media for erasable optical recording applications. The model exhibits the observed behavior of the media such as nucleation and growth of reverse-magnetized domains under external magnetic fields; square hysteresis loops; temperature dependence of coercivity; formation and stability of domains under conditions of thermomagnetic recording; and incomplete erasure with insufficient applied fields.

• Research Organization: Boston University, College of Engineering, Boston, Massachusetts 02215
• OSTI ID: 6811088
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 61:4; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ANISOTROPY
COBALT ALLOYS
COERCIVE FORCE
COMPUTERIZED SIMULATION
DOMAIN STRUCTURE
DYSPROSIUM ALLOYS
FILMS
GADOLINIUM ALLOYS
HYSTERESIS
IRON ALLOYS
MAGNETIC DISKS
MAGNETIC FIELDS
MAGNETIC STORAGE DEVICES
MAGNETISM
MAGNETIZATION
MATERIALS
MEMORY DEVICES
METALLIC GLASSES
NUCLEATION
RARE EARTH ALLOYS
RECORDING SYSTEMS
SIMULATION
TERBIUM ALLOYS
THERMOMAGNETISM
THIN FILMS