Structural and magnetic modifications of Cr-implanted Permalloy
- Institute of Ion Beam Physics and Materials Research, Forschungszentrum Rossendorf, P.O. Box 51 01 19, 01314 Dresden (Germany)
The static and dynamic magnetic properties, especially the magnetic damping behavior, have been investigated as a function of saturation magnetization in thin Permalloy films. Ion implantation doping with Cr in the percentage regime has been used to effectively reduce the Curie temperature and the saturation magnetization at room temperature. In order to understand the magnetic modifications the changes in stoichiometry but also the ion-induced structural changes have been addressed. As a function of fluence first an improvement of the (111) fiber texture, then a lattice expansion, and finally a partial amorphization of the interface near region of the Permalloy layer are found. The region of amorphization can be understood quantitatively by the concentration profiles as a function of depth in combination with irradiation-induced damage formation. The magnetic properties change correspondingly. For increasing Cr doping a drop in saturation magnetization and a decrease of the uniaxial magnetic anisotropy is observed. For a fluence of 0.8x10{sup 16} Cr/cm{sup 2} ({approx_equal}4 at. %) the magnetic damping parameter {alpha} increases by a factor of more than 3. This strong increase is mainly caused by doping effects.
- OSTI ID:
- 20788178
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 73, Issue 18; Other Information: DOI: 10.1103/PhysRevB.73.184410; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
Similar Records
Magnetic properties of the spinel-type Cu(Cr{sub 1-x}Hf{sub x}){sub 2}S{sub 4}
Anion substitution effects on the structure and magnetism of the chromium chalcogenide Cr{sub 5}Te{sub 8}-Part III: Structures and magnetism of the high-temperature modification Cr{sub (1+x)}Q{sub 2} and the low-temperature modification Cr{sub (5+x)}Q{sub 8} (Q=Te, Se; Te:Se=5:3)
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMORPHOUS STATE
ANISOTROPY
CHROMIUM
CURIE POINT
DAMPING
FERROMAGNETIC MATERIALS
INTERFACES
ION IMPLANTATION
IONS
IRRADIATION
LAYERS
MAGNETIC PROPERTIES
MAGNETIZATION
PERMALLOY
PHASE TRANSFORMATIONS
PHYSICAL RADIATION EFFECTS
SOLIDS
STOICHIOMETRY
TEXTURE
THIN FILMS