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Effect of annealing on the magnetic microstructure of high-pressure torsion iron; The Relevance of higher-order contributions to the magnetic small-angle neutron scattering cross section

高圧下ひずみ加工した鉄の磁気ミクロ組織における熱処理の効果; 磁気中性子小角散乱断面積の高次項の寄与との関連

Bersweiler, M.*; 佐藤 宏和*; 足立 望*; 戸高 義一*; Peral, I.*; Kohlbrecher, J.*; Zaporozhets, V. D.*; Metlov, K. L.*; Michels, A.*; 大場 洋次郎  

Bersweiler, M.*; Sato, Hirokazu*; Adachi, Nozomu*; Todaka, Yoshikazu*; Peral, I.*; Kohlbrecher, J.*; Zaporozhets, V. D.*; Metlov, K. L.*; Michels, A.*; Oba, Yojiro

Magnetic microstructures in severely deformed iron produced via high-pressure torsion (HPT) straining have been investigated using small-angle neutron scattering. The results reveal that nonneglibible third-order scattering contribution in the inhomogeneities amplitude of magnetization is induced via HPT straining and the contribution becomes small with subsequent annealing. The contribution has negative values, which suggest that the inhomogeneity of the magnetic anisotropy enhanced via HPT is a possible origin of the third-order contribution.

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