Details

Autor(en) / Beteiligte

• Dang, V. S.
• Song, Y. Y.
• Hoa, N. Q.
• Yu, S. C.
• Yoo, Y. G.

Titel

Ferromagnetism-to-Paramagnetism Transition in the ZnMnO System

Ist Teil von

• Journal of the Korean Physical Society, 2008, 52(5), , pp.1398-1401

Ort / Verlag

한국물리학회

Erscheinungsjahr

2008

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The magnetic properties of Mn- and P-doped ZnO prepared by using the solid state reaction and pulsed laser deposition (PLD) were investigated by measuring the magnetization and the absorption derivative of the electron paramagnetic resonance (EPR). The film's thickness was about 0.3 μm. The X-ray diraction pattern indicated a single-phase polycrystalline ZnO structure without any MnO₂ phase in both the polycrystalline samples and the thin lms. The magnetic behaviors of the samples were determined by using an alternating gradient magnetometer (AGM) at room tempera- ture. All the bulk samples showed ferromagnetism at room temperature. Mn-doped ZnO films with Zn₃P₂ added also showed ferromagnetism at room temperature. A transition from ferromagnetism to paramagnetism with increasing in sintering temperature was detected in the EPR experiments. The absorption derivative of the EPR signal showed hyperne splitting for the samples sintered at 800 and 900℃ due to a spin degeneracy of Mn²+, the hyperfine splitting disappeared for the samples sintered at 1000℃ due to a superposition of the six lines of hyperfine splitting. KCI Citation Count: 6