Published March 2000 | Version v1
Journal article Metadata-only

CEMS with applied magnetic fields on a 57Fe ion-implanted TMR granular film (II). Analysis of spectra

Creators

  • 1. Musashi Inst. of Tech., Tokyo (Japan)
  • 2. Electrotechnical Lab., Tsukuba, Ibaraki (Japan)
  • 3. Research Center of Ion Beam Technology, Hosei Univ., Tokyo (Japan)

Description

An α-Al2O3 single crystal implanted with 57Fe ions (100 keV, 1 x 1017 ions/cm2) was investigated using conversion electron Moessbauer spectroscopy (CEMS) with applied magnetic fields, Bex, up to 4 kG. The following components were identified from the consistent sets of least-square fits for all the spectra: two sets of superparamagnetic alpha-Fe particles with the average sizes of ≅ 4 and ≤ 3 nm; γ-Fe like (non/paramagnetic) particles with isomer shifts ≅ -0.08 mm/s; two forms of ferrous iron (Fe2+I and Fe2+II) which are magnetically not active (paramagnetic). The isomer shifts of the large (≅ 4 nm) α-Fe particles were estimated to be the same as that of bulk α-Fe. (author)

Additional details

Publishing Information

Journal Title
Report of Research Center of Ion Beam Technology, Hosei University, Supplement
Journal Issue
no.18
Journal Page Range
p. 165-168
ISSN
0914-2908

Conference

Title
18. symposium on Materials Science and Engineering
Dates
15-16 Dec 1999
Place
Koganei, Tokyo (Japan)

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
31034920
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CORUNDUM; ION IMPLANTATION; IRON 57; IRON-ALPHA; IRON-GAMMA; ISOMER SHIFT; KEV RANGE 100-1000; MAGNETIC FIELDS; MAGNETORESISTANCE; MOESSBAUER EFFECT; PARAMAGNETISM; SUPERPARAMAGNETISM
Descriptors DEC
ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELEMENTS; ENERGY RANGE; EVEN-ODD NUCLEI; INTERMEDIATE MASS NUCLEI; IRON; IRON ISOTOPES; ISOTOPES; KEV RANGE; MAGNETISM; METALS; MINERALS; NUCLEI; OXIDE MINERALS; PHYSICAL PROPERTIES; STABLE ISOTOPES; TRANSITION ELEMENTS

Optional Information

Notes
5 refs., 3 figs., 1 tab.