Amorphous magnetic alloys based on transition metals such as iron, cobalt, nickel (about 90% (atomic fraction)) and containing about 10% (atomic fraction) of metal elements such as zirconium, hafnium or titanium. Some of them (≤ 10% (atomic fraction)) iron, cobalt, nickel can be replaced by other metal elements or metal-like silicon, boron. This kind of alloy is prepared by melt quenching and sputtering deposition method.
For cobalt-zirconium alloys, the magnetic moment nB decreases monotonically with increasing zirconium content in a manner similar to that of cobalt-phosphorus and cobalt-boron systems. Because the Curie temperature Tc of cobalt-zirconium series is far away from the crystallization temperature Tx, its Tc value is difficult to measure. A nickel-zirconium alloy containing 11% zirconium (atomic fraction) has very little nB. The compositional dependence of nB and Tc of iron-zirconium series shows anomalous behavior, i.e., nB and Tc. The value decreases monotonically with the decrease of zirconium content. For the (Fe, Co, Ni)90 zirconium 10 series ternary alloy, the change of saturation magnetization in the nickel-rich region is similar to that in the (Fe, Co, Ni) silicon-boron alloy, while the behavior of the iron-rich region is completely different, and the saturation magnetization of Fe90 Zr10 alloy is much lower than that of the iron-metal-like amorphous magnetic alloy. This value increases due to the partial substitution of nickel or cobalt for iron, and the saturation magnetization shows a maximum when it contains 20% to 30% cobalt or nickel (atomic fraction). In addition to the above abnormal characteristics, the Tc value in iron-rich area decreases with the increase of iron content. The magnetostrictive (lambda-s) values of this quasi-ternary Fe-cobalt-nickel alloy with fixed zirconium content and fe-rich transition metal chromium alloy decrease sharply with the increase of iron content. The maximum saturation magnetic induction intensity (Bs) near (Fe0.7CO0.3)90Zr10 was 1.67T, and decreased with the increase of nickel content. The zero magnetostrictive component is located near (Co0.88Ni0.12)90Zr10 and moves to the iron-rich region with the increase of nickel content. The Tx and Ms of Co90Zr10 amorphous magnetic alloy are quite high, but its λs is not zero (λs=3×10-6), and excellent soft magnetic properties can be obtained if cobalt is replaced by other elements (content ≤ 10% (atomic fraction)) (Table 2). The addition of refractory metals will result in a significant increase in Tc, and the degree of improvement increases in the following order: vanadium, chromium, molybdenum, and tungsten. The addition of silicon significantly reduces Tx. Elements such as beryllium, aluminum, nickel and iron can slightly reduce Tx. Manganese increases Tx slightly.
