Swift heavy ions in magnetic insulators: A damage-cross-section velocity effect

Journal Article · Thu Jul 01 00:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.920· OSTI ID:6367318

Meftah, A ^[1]; Brisard, F; Costantini, J M ^[2]; Hage-Ali, M; Stoquert, J P ^[3]; Studer, F ^[4]; Toulemonde, M ^[1]

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1. Centre Interdisciplinaire de Recherches avec les Ions Lourds, BP 5133, F-14040 Caen CEDEX (France)
2. Commissariat a l'Energie Atomique, Service PTN, BP 12, F-91680 Bruyeres le Chatel (France)
3. Centre de Recherches Nucleaires, Groupe Phase, F-67037 Strasbourg CEDEX (France)
4. Crismat enInstitut des Sciences de la Matiere et du Rayonnement, Universite de Caen, 14032 Caen CEDEX (France)

The damage in ferrimagnetic yttrium iron garnet, Y[sub 3]Fe[sub 5]O[sub 12] or YIG, induced by energetic heavy-ion bombardment in the electronic stopping-power regime has been studied in the low-velocity range (for a beam energy [ital E][le]3.6 MeV/amu). Epitaxial thin films of YIG on [111]-Gd[sub 3]Ga[sub 5]O[sub 12] substrates were thus irradiated at room temperature with 15-MeV [sup 19]F, 50-MeV [sup 32]S, 650-MeV [sup 181]Ta, 750-MeV [sup 208]Pb, and 666-MeV [sup 238]U. The damage-cross-section [ital A] is extracted from channeling-Rutherford-backscattering spectroscopy and compared to previous works. All the experimental results show that at one given value of [ital dE]/[ital dx], the damage cross section is higher for low-velocity ions than for high-velocity ions over a large range of [ital dE]/[ital dx]. At constant [ital dE]/[ital dx], the larger the difference between the ion velocities is, the larger the difference between the damage cross sections. Such a deviation might be explained by the effect of the energy deposition being more localized for the low-velocity ions than for the high-velocity ions. This work clearly indicates that the electronic stopping power is not the only key parameter in the creation of ion tracks, and that the damage cross section depends on the lateral distribution of the energy deposition.

• OSTI ID: 6367318
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 48:2; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
GARNETS
PHYSICAL RADIATION EFFECTS
MAGNETIC MATERIALS
AMBIENT TEMPERATURE
CROSS SECTIONS
FLUORINE 19 BEAMS
LEAD 208 BEAMS
MEV RANGE
STOPPING POWER
SULFUR 32 BEAMS
TANTALUM 181
URANIUM 238 BEAMS
BEAMS
ENERGY RANGE
HEAVY NUCLEI
ION BEAMS
ISOTOPES
MATERIALS
MINERALS
NUCLEI
ODD-EVEN NUCLEI
OXYGEN COMPOUNDS
RADIATION EFFECTS
RADIOACTIVE ION BEAMS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
STABLE ISOTOPES
TANTALUM ISOTOPES
665300* - Interactions Between Beams & Condensed Matter- (1992-)
360206 - Ceramics
Cermets
& Refractories- Radiation Effects