Magnetic relaxation phenomena in cobalt
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H.J. Blythe
Abstract
The magnetic relaxation spectrum of polycrystalline, unirradiated Co has been investigated from 4 to 700 K. Both polycrystalline and single-crystal hexagonal close-packed Co have also been investigated after 3 MeV electron irradiation at either 8 or 40 K to doses of 1023 m–2. For unirradiated Co, results are interpreted as due to interactions between dislocations and domain walls. After irradiation at 8 K, relaxation peaks occur in the range 10 –50 K due to the re-orientation of Frenkel pairs which stabilise at the start of the stage-I anneal; a relaxation at 75 K is attributed to an intrinsic interstitial trapped at interstitial carbon. On anneal in the range 220 – 400 K, low-temperature relaxations evolve in samples containing impurities; these are attributed to reorientation of the migrating stage-III defects trapped at impurities.
The author is indebted to Professor H. Kronmüller for many successful and convivial collaborations that have extended over more than three decades. He is also grateful to Dr. E. Klugmann for making available the Co single crystal.
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© 2002 Carl Hanser Verlag, München
Articles in the same Issue
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- Notifications/Mitteilungen
- Personal/Personelles
- Bücher/Books
- Conferences/Konferenzen
- DGM Training/DGM Fortbildung
Articles in the same Issue
- Frontmatter
- Editorial
- Editorial
- Articles/Aufsätze
- Interplay between chemical and magnetic roughness of Pt in a Pt/Co bilayer investigated with X-ray resonant magnetic reflectometry
- Thermal stability and magnetic anisotropy dispersion in high-density hard-disk media
- Thickness dependence of magnetization structures in thin Permalloy rectangles
- Solving the selectivity problem in magnetic random access memories using configurations that form C-states
- Second-order magnetoelastic effects: From the Dirac equation to the magnetic properties of ultrathin epitaxial films for magnetic thin-film applications
- Magnetic relaxation in nanocrystalline systems: linking Monte Carlo steps with time
- Effect of domain size on the magneto-elastic damping in amorphous ferromagnetic metals
- The character and role of grain boundaries in NdFeB-type alloys and magnets
- Magnetic domain structure and spin reorientation process
- Magnetic properties of Tb(Fe, Mo)12 and Tb(Fe, Mo)12C compounds
- Microstructure, magnetic properties and magnetic hardening in 2 : 17 Sm–Co magnets
- Micromagnetism and microstructure – tailoring of high-performance permanent magnets
- Metastable alloys at moderate cooling rates
- Thermal critical phenomena and crossover between critical regimes in ferromagnets with long-range interactions
- Vacancies in thermal equilibrium and ferromagnetism near the Curie temperature
- The vortex lattice in superconductors
- Functional substrates – a novel approach to tailor transport properties and flux-line pinning in YBa2Cu3O7 – x thin films
- Superconducting permanent magnets and their application in magnetic levitation
- Magneto-optical studies of flux pinning in high-temperature superconductors
- Atomic transport in amorphous metals
- A novel technique for measuring diffusivities of short-lived radioisotopes in solids
- Hydrogen four-level tunnel systems in substitutional body-centred cubic alloys
- Magnetic relaxation phenomena in cobalt
- The Verwey transition in magnetite as studied by means of definite impurity doping
- Notifications/Mitteilungen
- Personal/Personelles
- Bücher/Books
- Conferences/Konferenzen
- DGM Training/DGM Fortbildung
