0.5%アルミニウム鉄の単結晶及び多結晶の強磁性異方性常数，飽和磁場，及び残留磁化とそれらに対する消磁方法の影響

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タイトル別名
  • Ferromagnetic Anisotropy Constants, Saturation Magnatic Field, and Residual Magnetization, and Their Dependence on the Method of Demagnetization in Single Crystals and Polycrystals of 0.5 Percent Aluminium Iron
  • 0.5 アルミニウムテツ ノ タンケッショウ オヨビ タケッショウ ノ キョウジセイ イホウセイ ジョウスウ , ホウワ ジバ , オヨビ ザンリュウ ジカ ト ソレラ ニ タイスル ショウジホウホウ ノ エイキョウ

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抄録

The magnetocrystalline anisotropy constants, K1 and K2 as well as K0, the saturation magnetic field, Hs, and the residual magnetization (as the magnetization at the break point of the descending hysteresis curve), Ik, have been studied at ordinary temperatures, using the ballistic method, with single crystal and polycrystal rods of iron containing 0.53%Al in thermally demagnetized (TD) state and in alternating-current demagnetized (AD) state. The results of the measurements and the conclusions obtained are as follows: In both of single crystals and polycrystal, irrespective of crystal orientation, ATD>AAD (A=∫0ISHdI) and (HS)TD>(HS)AD. In single crystals, (HS[110]−HS[100])TD>(HS[110]−HS[100])AD,(HS[110]−HS[111])TD>(HS[110]−HS[111])AD, and (Ik)TD<(Ik)AD<Is⁄∑\limitsi=13βi (Kaya’s rule), where β′is (i=1, 2, 3) are the direction cosines of the rod axis of a single crystal specimen, and, irrespective of the method of demagnetization, HS[110]>HS[111]>HS[100]. Further, (K0)TD>(K0)AD and (K1)TD>(K1)TD. These may be explained by an idea of small uniaxial ferromagnetic anisotropies with negative and positive anisotropy constants induced, respectively, by TD and AD. Moreover, (K2)AD<K2)AD and, irrespective of the method of demagnetization, 3⁄2>K2⁄K1>−3, (HS)poly>(HS)single, and (Ik)poly>IS⁄∑\limitsiβi. The observed relations between polycrystal and single crystal data may be interpreted in terms of the magnetic interaction between crystal grains. Furthermore, the formula K1=αIs(Hs)poly, where α=1⁄3∼1/4, holds for cubic polycrystalline ferromagnetics.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 25 (7), 441-445, 1961

    公益社団法人 日本金属学会

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