Measurements of domain-wall energy density for amorphous rare earth--transition metal thin films

Journal Article · Mon Oct 15 00:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.346208· OSTI ID:6292030

Hajjar, R A; Shieh, H D ^[1]

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1. IBM Research Division, T. J. Watson Research Center, Yorktown Heights, New York 10598 (USA)

The value of domain-wall energy density ({sigma}{sub {ital w}}) has been most often assumed to be proportional to ({ital A}{sub {ital x}}{ital K}{sub {ital u}}){sup 1/2}, where exchange stiffness ({ital A}{sub {ital x}}) is usually calculated from the mean-field theory. We report a simple method to derive {sigma}{sub {ital w}} from the difference between the onset of expanding and collapsing fields ({Delta}{ital H}) for circular domains. A micro-Kerr hysteresis-loop tracer with submicrometer resolution is used to measure the destabilizing field of domains written thermomagnetically in TbFeCo and GdTbFeCo films.

• OSTI ID: 6292030
• Journal Information: Journal of Applied Physics; (USA), Vol. 68:8; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT ALLOYS
DOMAIN STRUCTURE
GADOLINIUM ALLOYS
IRON ALLOYS
TERBIUM ALLOYS
ENERGY DENSITY
KERR EFFECT
MAGNETIC STORAGE DEVICES
MAGNETO-OPTICAL EFFECTS
THIN FILMS
ALLOYS
DIELECTRIC PROPERTIES
ELECTRICAL PROPERTIES
FILMS
MEMORY DEVICES
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
360104* - Metals & Alloys- Physical Properties