Ni-(Al-Fe) 합금계의 결정구조 및 자기적 성질(Ⅱ)

Abstract

Ni-(Al-Fe) 합금계의 결정구조 및 자기적 성질을 조사하여 자기적 특성에 미치는 강자성상(ferrimagnetic phase)의 영향을 해석하였다.

X-선 회절 실험결과 x≤0.10의 범위에서는 격자상수가 약 2.89Å인 CsCI(B2) 구조의 단상을 나타내었으며, x≥0.15의 범위에서는 격자상수가 약 3.64Å인 FCC 구조로 해석할 수 있는 제2상이 나타났다.

자기적 측정 결과 측정 온도범위에서 x≤0.15 범위에서는 상자성으로 나타났으며, 0.20≤x≤0.35에서 초상자성을 나타내었고, ??에서는 강자성을 특성을 보여주었다.

본 합금계의 조성(x)에 따른 자기적 성질의 변화는 제2상의 연결효과(percolation effect)에 의해 설명하였다.

Crystal structures and magnetic properties of Ni-(Al-Fe) alloys have been investigated and comprehensed with influence of second phase (ferromagnetic phase) for magnetic properties.

X-ray diffraction data revealed that specimens were single-phase in B2(CsCl) structure when x≤0.10, lattice parameter ∼2.89Å and showed second phase in FCC structure when x≥0.15 with constant lattice parameter, ∼3.64Å.

Magnetic measurements showed paramagnetism when x≤0.15, superparama-gnetism when 0.20≤x≤0.35 and ferromagnetism when x≥0.40.

The magnetic changes with composition(x) were analized of the percolation effect of ferromagnetic second phase.

Crystal structures and magnetic properties of Ni-(Al-Fe) alloys have been investigated and comprehensed with influence of second phase (ferromagnetic phase) for magnetic properties.

X-ray diffraction data revealed that specimens were single-phase in B2(CsCl) structure when x≤0.10, lattice parameter ∼2.89Å and showed second phase in FCC structure when x≥0.15 with constant lattice parameter, ∼3.64Å.

Magnetic measurements showed paramagnetism when x≤0.15, superparama-gnetism when 0.20≤x≤0.35 and ferromagnetism when x≥0.40.

The magnetic changes with composition(x) were analized of the percolation effect of ferromagnetic second phase.