کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1801289 1024565 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Superparamagnetic properties of La1−xBaxCoO3 (0.0<x<0.18)
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Superparamagnetic properties of La1−xBaxCoO3 (0.0<x<0.18)
چکیده انگلیسی

The static and dynamic magnetic properties of La1−xBaxCoO3 (00.10, are also observed simultaneously. Based on the comparisons with canonical spin-glass Au96Fe4 alloy and conventional superparamagnetic (SPM) Cu97Co3 alloy, the nature of the magnetic behaviors in LBCO is ascribed to the superparamagnetic cluster rather than spin glass. Though the magnetic properties behave as SPM, LBCO has one critical point different from that of the conventional SPM Cu97Co3 alloy. The segregated Co nanoparticles in the Cu97Co3 alloy are isolated by nonmagnetic background while the clusters in LBCO are embedded in an antiferromagnetic matrix. The SPM behavior of LBCO can only exist at low temperature because the antiferromagnetic matrix transfers to paramagnetic phase at Neél temperature TN and the SPM cluster turns into ferromagnetic (FM) above TN.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 321, Issue 9, May 2009, Pages 1280–1284
نویسندگان
, ,