Magnetic States in Ensemble of Ferromagnetic Nanoparticles in Cu-Mn-Al Alloy

被引：3
|
作者：
Konoplyuk, S. M. [1 ,2 ]
Kozlova, L. E. [1 ,2 ]
Kokorin, V. V. [1 ,2 ]
Perekos, A. O. [3 ]
Kolomiets, O. V. [4 ]
机构：
[1] Natl Acad Sci Ukraine, Inst Magnetism, Vernadsky Blvd 36-B, UA-03680 Kiev, Ukraine
[2] Minist Educ & Sci Ukraine, Vernadsky Blvd 36-B, UA-03680 Kiev, Ukraine
[3] Natl Acad Sci Ukraine, GV Kurdyumov Inst Met Phys, Vernadsky Blvd 36, UA-03680 Kiev, Ukraine
[4] Lviv Polytech Natl Univ, Dept Phys, S Bandery Str 12, UA-79013 Lvov, Ukraine
来源：
NANOSCALE RESEARCH LETTERS | 2016年 / 11卷
关键词：
Granular system; Superparamagnetism; Magnetoresistance; Cu-Mn-Al; GIANT MAGNETORESISTANCE;
D O I：
10.1186/s11671-016-1233-z
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Two Cu-Mn-Al samples of different compositions were studied: one exhibiting martensitic transformation, another without structural transition. X-ray diffraction and magnetic measurements demonstrate that different magnetic behaviors of alloys originate from different concentrations and sizes of ferromagnetic nanoparticles, which appear after solid solution decomposition. Estimation of magnetic moments of ferromagnetic nanoparticles from magnetization curves was performed using Langevin function and compared to those obtained from X-ray examination. Granular systems are known to show giant magnetoresistance. Therefore, magnetoresistance of Cu-Mn-Al melt-spun ribbons after different aging times was measured. The study has shown that increase in the concentration of Mn atoms and time of aging in Cu-Mn-Al alloy leads to an increase in the amount of precipitated phase appearing as ferromagnetic nanoparticles.
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页码：1 / 5
页数：5
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