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Article Navigation >  Nuclear Physics Review  > 2012  >  29(4): 414-418

ZHONG Huo-ping, LI Gong-ping, XU Nan-nan, LI Tian-jing, GONG Heng-feng, CHEN Jing-sheng. The Structural, Ferromagnetic Properties of Singlecrystal TiO2 Implanted with Co Ions[J]. Nuclear Physics Review, 2012, 29(4): 414-418. doi: 10.11804/NuclPhysRev.29.04.414
Citation: ZHONG Huo-ping, LI Gong-ping, XU Nan-nan, LI Tian-jing, GONG Heng-feng, CHEN Jing-sheng. The Structural, Ferromagnetic Properties of Singlecrystal TiO2 Implanted with Co Ions[J]. Nuclear Physics Review, 2012, 29(4): 414-418. doi: 10.11804/NuclPhysRev.29.04.414
shu

The Structural, Ferromagnetic Properties of Singlecrystal TiO2 Implanted with Co Ions

doi: 10.11804/NuclPhysRev.29.04.414
  • 1.

    School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; 2.State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;3.Department of Materials Science and Engineering, National University of Singapore, Singapore 117608, Singapore

  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2012-12-20
  • At room temperature， monocrystalline plates of rutile (TiO2) were implanted with cobalt ions of an energy of 80 keV to fluences of 1×1016 and 1×1017 ions/cm2 respectively . The 1×1017 ions/cm2 Co implanted samples were annealed in nitrogen at 900 ℃ for 30 min. The magnetic properties of Co implanted samples were measured with a superconducting quantum interference device magnetometer (SQUID) at room temperature. Furthermore, the X ray diffraction (XRD) and Extended X ray Absorption Fine Structure (EXAFS) were applied to investigate the structural and compositional properties of Co implanted samples. The magnetic measurements of samples showed that the size of the saturation magnetization of the Co implanted samples were related to the fluence of ions, and the saturation magnetization of the sample after annealed decreased significantly. The EXAFS measurements showed the presence of cobalt metallic clusters in the sample implanted to ion fluence of 1×1017 ions/cm2. The Co metallic clusters disappeared in the sample after annealed, and resulted in the oxidized Co, which is presumed to substitute into the Ti site. The formation of Co clusters or not was determined by the ion fluence. The relation between ferromagnetic behavior and microscopic structure of the Co implanted samples is discussed.
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The Structural, Ferromagnetic Properties of Singlecrystal TiO2 Implanted with Co Ions

doi: 10.11804/NuclPhysRev.29.04.414
  • 1. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; 2.State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;3.Department of Materials Science and Engineering, National University of Singapore, Singapore 117608, Singapore
  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2012-12-20

Abstract: At room temperature， monocrystalline plates of rutile (TiO2) were implanted with cobalt ions of an energy of 80 keV to fluences of 1×1016 and 1×1017 ions/cm2 respectively . The 1×1017 ions/cm2 Co implanted samples were annealed in nitrogen at 900 ℃ for 30 min. The magnetic properties of Co implanted samples were measured with a superconducting quantum interference device magnetometer (SQUID) at room temperature. Furthermore, the X ray diffraction (XRD) and Extended X ray Absorption Fine Structure (EXAFS) were applied to investigate the structural and compositional properties of Co implanted samples. The magnetic measurements of samples showed that the size of the saturation magnetization of the Co implanted samples were related to the fluence of ions, and the saturation magnetization of the sample after annealed decreased significantly. The EXAFS measurements showed the presence of cobalt metallic clusters in the sample implanted to ion fluence of 1×1017 ions/cm2. The Co metallic clusters disappeared in the sample after annealed, and resulted in the oxidized Co, which is presumed to substitute into the Ti site. The formation of Co clusters or not was determined by the ion fluence. The relation between ferromagnetic behavior and microscopic structure of the Co implanted samples is discussed.

ZHONG Huo-ping, LI Gong-ping, XU Nan-nan, LI Tian-jing, GONG Heng-feng, CHEN Jing-sheng. The Structural, Ferromagnetic Properties of Singlecrystal TiO2 Implanted with Co Ions[J]. Nuclear Physics Review, 2012, 29(4): 414-418. doi: 10.11804/NuclPhysRev.29.04.414
Citation: ZHONG Huo-ping, LI Gong-ping, XU Nan-nan, LI Tian-jing, GONG Heng-feng, CHEN Jing-sheng. The Structural, Ferromagnetic Properties of Singlecrystal TiO2 Implanted with Co Ions[J]. Nuclear Physics Review, 2012, 29(4): 414-418. doi: 10.11804/NuclPhysRev.29.04.414
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