Increases in giant magnetoresistance by ion irradiation

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.3481· OSTI ID:6661194

Kelly, D M; Schuller, I K ^[1]; Korenivski, V; Rao, K V ^[2]; Larsen, K K; Bottiger, J ^[3]; Gyorgy, E M; van Dover, R B ^[4]

---

1. Department of Physics, 0319, University of California, San Diego, La Jolla, California 92093-0319 (United States)
2. Department of Condensed Matter Physics, Royal Institute of Technology, 10044 Stockholm (Sweden)
3. Institute of Physics and Astronomy, University of Arhus, DK-8000 Arhus (Denmark)
4. AT T Bell Laboratories, Murray Hill, New Jersey 07974 (United States)

We have studied the effect of 500-keV Xe[sup +] irradiation on the structure, magnetotransport, and magnetic properties of sputtered Fe/Cr multilayers. Initially, with increasing dosage the giant magnetoresistance (GMR) increases with a concomitant increase in the interfacial roughness as indicated by changes in the low-angle x-ray-diffraction spectra. At doses higher than 1[times]10[sup 13] ions/cm[sup 2], the value of the GMR progressively decreases, corresponding to progressively increasing regions of the film which are ferromagnetically coupled. The resulting structural disorder increases the overall electronic scattering rate and hence the electrical resistance at these higher doses. These results demonstrate that increased interfacial scattering enhances the GMR and thus plays an important role in the mechanism determining the GMR in Fe/Cr superlattices.

• OSTI ID: 6661194
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:5; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
AMBIENT TEMPERATURE
CHARGED PARTICLES
CHROMIUM
COHERENT SCATTERING
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY RANGE
INTERFACES
IONS
IRON
KEV RANGE
KEV RANGE 100-1000
MAGNETORESISTANCE
METALS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SCATTERING
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TRANSITION ELEMENTS
X-RAY DIFFRACTION
XENON IONS