Magnetic relaxation in neutron‐irradiated ordered ni3Fe

Magnetic aftereffect measurements are made on ordered Ni3Fe samples after neutron-irradiation at 30 K to doses varying from 1021 to 5 × 1022 neutrons m−2. A well-defined orientation after-effect is observed at 42 K with an activation energy of 0.11 eV; this is interpreted in terms of the reorientation of an octahedral interstitial. At higher temperatures, relaxations are observed which are attributed to a long-range diffusion of defects. Magnetische Nachwirkungsmessungen werden in geordneten Ni3Fe-Proben nach Neutronenbestrahlung bei 30 K mit Dosen von 1021 bis 5 × 1022 Neutronen m−2 durchgefuhrt. Eine wohldefinierte Orientierungsnachwirkung mit einer Aktivierungsenergie von 0,11 eV wird bei 42 K beobachtet; diese wird der Umorientierung eines Eigenzwischengitteratoms zugeschrieben. Bei hoheren Temperaturen werden Relaxationsprozesse beobachtet, die der weitreichenden Diffusion von Fehlstellen zugeschrieben werden.

[1]  H. Kronmüller,et al.  Magnetic relaxation occurring in low‐temperature electron‐irradiated α‐Fe after annealing above stage III (220 K) , 1980 .

[2]  F. Walz,et al.  Disaccomodation measurements in Ni3Fe after low temperature electron and neutron irradiation , 1980 .

[3]  H. Blythe,et al.  Magnetic disaccommodation between 30 and 300 K in low‐temperature neutron‐irradiated iron , 1979 .

[4]  H. Schaefer,et al.  Interstitial Migration in Iron at 220 K , 1979, March 16.

[5]  W. Frank,et al.  Interpretation of radiation damage in platinum.— III. Migration modes and thermal conversion of self-interstitials , 1979 .

[6]  H. Blythe,et al.  Low-Temperature Magnetic Relaxation in Neutron-Irradiated α-Iron , 1978, October 16.

[7]  H. Blythe,et al.  Point-Defect Relaxations in Dilute Iron-Nickel Alloys after Low-Temperature Neutron Irradiation , 1978, April 16.

[8]  F. Walz,et al.  The magnetic after-effect spectrum of α-iron after low-temperature electron irradiation , 1977 .

[9]  H. Schaefer,et al.  The magnetic after‐effect spectrum in cobalt between 20 and 350 K after electron irradiation at 4.2 K , 1976 .

[10]  H. Schaefer,et al.  Magnetic Aftereffect Phenomena in Cobalt between 4.2 and 20 K after Low‐Temperature Electron Irradiation , 1976 .

[11]  D. G. Morris,et al.  Ordering and domain growth in Ni3Fe , 1976 .

[12]  M. Robinson,et al.  Fundamental aspects of radiation damage in metals. Proceedings of an international conference, Gatlinburg, Tennessee, October 6--10, 1975 , 1975 .

[13]  H. Kronmüller.  Theory of magnetic cold-work peak in ferromagnetic materials , 1974 .

[14]  F. Walz.  Ein vollständig automatisiertes Meßverfahren zur Bestimmung der magnetischen Nachwirkung in ferromagnetischen Kristallen , 1974 .

[15]  R. J. Arsenault,et al.  Defects and defect clusters in B.C.C. metals and their alloys : proceedings , 1973 .

[16]  H. Schaefer,et al.  The Ferromagnetic After‐Effect at 55 K in Electron‐Irradiated Nickel , 1972 .

[17]  H. Kronmüller,et al.  MAGNETIC RELAXATION IN HIGH-PURITY IRRADIATED IRON. II. ELECTRON IRRADIATION. , 1971 .

[18]  Helmut Kronmüller,et al.  Nachwirkung in Ferromagnetika , 1968 .

[19]  F. Walz.  Untersuchung der magnetischen Nachwirkung in Nickel nach Neutronenbestrahlung und plastischer Verformung , 1968 .

[20]  H. Wenzl,et al.  Magnetic After Effects in Iron after Low Temperature Irradiation with Neutrons , 1965, February 1.

[21]  A. Seeger,et al.  Die mechanische Relaxation von Hantel‐Zwischengitteratomen in Nickel , 1965 .