Temperature hysteresis and magnetic transitions in amorphous Fe-Ni-Zr alloys

Conference · Tue Sep 01 04:00:00 EDT 1987

OSTI ID:6252927

Violet, C E; Borg, R J; May, L; Rao, K V; Nogues, J; Taylor, R D; Batra, A P

Amorphous Fe/sub 89.3/Ni/sub 0.3/Zr/sub 10/ and Fe/sub 70/Ni/sub 20/Zr/sub 10/ alloys in the ''as-cast'' and irradiated states have been studied with /sup 57/Fe Moessbauer spectroscopy, as well as ac and dc susceptibility. Samples were irradiated with 14-MeV neutrons at room temperature to fluences in excess of 10/sup 17/ n/cm/sup 2/ (approx. =3 x 10/sup -4/ dpa). The effects of the neutron irradiation on the magnetic properties of the Fe/sub 89.7/Ni/sub 0.3/Zr/sub 10/ alloy are minimal. Three new types of magnetic transitions have been discovered in the Ni(20) alloys. The first occurs in the ''as-cast'' sample. This is termed a ''slow spin-reorientation'' transition and occurs over the temperature range approx. =300 to approx. =120K. The neutron irradiation eradicated this transition but created two new transitions that occur only with the first cooldown: (1) a ''fast spin-reorientation'' transition occurring at a temperature or temperature range in the interval 300 280K, and (2) a ''fast spin-randomizing'' transition with a starting temperature in the 240 to 200K interval. Temperature hysteresis occurs only in the Ni(20) irradiated alloy. 3 refs., 2 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA); Royal Inst. of Tech., Stockholm (Sweden); Los Alamos National Lab., NM (USA); Howard Univ., Washington, DC (USA)
• DOE Contract Number: W-7405-ENG-48; W-7405-ENG-36
• OSTI ID: 6252927
• Report Number(s): UCRL-96764; CONF-871126-2; ON: DE88000228
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ADIABATIC DEMAGNETIZATION
ALLOYS
AMORPHOUS STATE
HYSTERESIS
IRON ALLOYS
IRRADIATION
MAGNETIC PROPERTIES
MOESSBAUER EFFECT
NICKEL ALLOYS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SPECTROSCOPY
ZIRCONIUM ALLOYS