Factors influencing the initial permeability of some alloys based on 80Ni20Fe

Copper permalloys for fluxgate magnetometer sensors

“…The second Interval (1953Interval ( -1969 In the 1960's another look was taken at these alloys, with regard to better understanding magnetic anisotropies, and also specifically looking for improved magnetic materials for fluxgate magnetometer sensors (Bozorth, 1953;Puzei and Molotitov, 1958;Puzei, 1961;Puzei, 1962;Odani, 1964;Lykens, 1966;Scanlon, 1966;Pfeifer, 1966;Odani and Sunazawa, 1967;Cohen, 1967;Scholefield et al, 1967;Snee, 1967;Gordon et al, 1968;English and Chin, 1969;Pfeifer and Boll, 1969). This activity With respect to fluxgate sensors, this led to Gordon et al's (1968) well known 6.0% molybdenum permalloy, a slow-cooled material.…”

“…Then as now, 4-5% molybdenum permalloys are also used for fluxgate sensors. It was not until the introduction of amorphous alloys to fluxgates (Shirae, 1984, Narod et al, 1985 that any newer materials were added to the fluxgate sensor roster. These authors noted strong correlations between fluxgate noise with respectively, Curie temperature and saturation moment, 𝑩𝑩 𝑠𝑠 .…”

Influence of process parameters and alloy composition on structural, magnetic and electrical characteristics of Ni–Fe permalloys

“…The Ni-Fe alloys are based on the face-centered cubic (FCC) portion of Ni-Fe system and contain about 40-90% Ni, up to a few percent each of other alloying elements like Cu, Mo, Cr, Co, Mn and balance is Fe [1][2][3]. Their remarkable magnetic properties have made them the subject of intensive study over the last about half a century.…”

“…The magnetic properties of the permalloys not only depend on the heat treatment under hydrogen atmosphere [2,3,[10][11][12][13][14] but also depend on the values of the anisotropy and magnetostriction constants. Both the parameters further depend on the degree of short-range order (SRO) developed in the materials [15].…”

Influence of nickel addition on magnetic and electro-mechanical behaviour of permalloys

“…In addition to the control on metallurgical process of the magnetic material, the magnetic properties of both the alloys depend on the heat treatment under hydrogen atmosphere (Bozorth 1951;Enoch and Fudge 1966;Scholefield et al 1967;Pfeifer and Radeloff 1980). The magnetic properties of these alloys also depend on the values of the anisotropy and magnetostriction constants.…”