Magnetic properties of amorphous and crystalline GdFe/sub 2/

Journal Article · Fri Sep 01 04:00:00 EDT 1978 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.325525· OSTI ID:7033956

Vittoria, C; Lubitz, P; Ritz, V

The magnetic and structural properties of GdFe/sub 2/ thin films prepared by electron beam coevaporation have been investigated. The measurements included magnetic resonance, magnetometer, the Moessbauer effect, x-ray diffraction, and Auger analysis. Comparisons were made between the properties of the as-deposited amorphous films and films annealed at various temperatures up to 500 /sup 0/C, at which point crystallization is essentially complete. The measured magnetization for amorphous films was less than the magnetization measured in crystalline films at all temperatures. The magnetic moment of the Gd and Fe ions within their respective magnetic sublattices were determined to be 7.6 and 2.12..mu../sub ..beta../ for crystalline GdFe/sub 2/. The sublattice moments in the amorphous case do not change appreciably from the crystalline case. The sublattice g values were determined to be slightly temperature dependent below 77 K. The Landau-Lifshitz magnetic damping parameter was determined to be approx.1 x 10/sup 7/ and 2 x 10/sup 7/ Hz for amorphous and crystalline films, respectively. For amorphous thin films on a Si substrate overcoated with Si, the spin-wave mode field positions obeyed a n/sup 2/ law with A/M=1.2 x 10/sup -9/ Oe cm/sup 2/, in agreement with calculation.

• Research Organization: Naval Research Laboratory, Washington, D.C. 20375
• OSTI ID: 7033956
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 49:9; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AMORPHOUS STATE
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
FERRIMAGNETIC MATERIALS
FILMS
GADOLINIUM ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC MATERIALS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIC RESONANCE
MAGNETIZATION
MOESSBAUER EFFECT
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
RESONANCE
SCATTERING
SPIN WAVES
X-RAY DIFFRACTION