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• W2312199989 abstract "The crystallographic structural and magnetic properties of polycrystalline La <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0.7</sub> Sr <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0.3</sub> Mn <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1_x</sub> Co <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>x</sub> O <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> (x = 0.4, 0.5, 0.6, 1.0) have been systematically studied in detail by neutron powder diffraction and magnetic measurements. The introduction of Co dopant to the Mn network has decreased the bandwidth (W) and the overlap between the O-2p and the Mn-3d orbitals. In addition, it in turn weakened the fragile double exchange coupling of Mn <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3+</sup> -O-Mn <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>4+</sup> and reduced the magnetization M as well as magnetic ordering temperature Tc. The magnetic measurements indicate the presence of mixed magnetic phases in this system. When the temperature is above Tc, the jump of field-dependent magnetization disappeared, which is related to the competition of ferromagnetic and antiferromagnetic interactions. The average atom magnetization extracted from M-H curve at 5 K using the approach-to-saturation method, is -.1.70 μB/Co for La <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0.7</sub> Sr <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0.3</sub> MnO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> . This value approaches to the neutron refined data 1.93(8) μB. However, as for x = 0.4, x = 0.5 and 0.6 samples, the calculated data from magnetization at 5 T are all smaller than the refined one, due to the existence of spin-glass-like phase. The weak magnetic peaks are responsible for the small magnetic moment data (0.48 μB for LSMO-Co <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0.5</sub> and 0.65 μB for LSMO-Co0.6). These results indicate the competing magnetic interactions in the system of La <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0.7</sub> Sr <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0.3</sub> Mn <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1_x</sub> Co <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>x</sub> O <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> compounds." @default.
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• W2312199989 date "2015-11-01" @default.
• W2312199989 modified "2023-10-18" @default.
• W2312199989 title "Competing Magnetic Interactions in Co-Doped La_0.7Sr_0.3MnO₃" @default.
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• W2312199989 doi "https://doi.org/10.1109/tmag.2015.2443154" @default.
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