TAILIEUCHUNG - Báo cáo " The effect of cobalt substitution on structure and magnetic properties of nickel ferrite "

A series of cobalt doped nickel ferrite with composition of Ni1-XCoXFe2O4 with x ranges from to (in steps of ) was prepared by using co-precipitation method and subsequently sintered, annealed at 6000C for 3h. The influence of the Co content on the crystal lattice parameter, the stretching vibration and the magnetization of specimens were subsequently studied. XRD and FTIR were used to investigate structure and composition variations of the samples. All samples were found to have a cubic spinel structure. . | VNU Journal of Science Mathematics - Physics 25 2009 153-159 The effect of cobalt substitution on structure and magnetic properties of nickel ferrite Nguyen Khanh Dung1 Nguyen Hoang Tuan2 1 Industry University Ho Chi Minh City 12 Nguyen Van Bao Ward 4 Go Vap District Hochiminh city Vietnam 2Can Tho University 3-2 Street Can Tho city Vietnam Received 15 August 2009 Abstract. A series of cobalt doped nickel ferrite with composition of Ni1-XCoxFe2O4 with x ranges from to in steps of was prepared by using co-precipitation method and subsequently sintered annealed at 6000C for 3h. The influence of the Co content on the crystal lattice parameter the stretching vibration and the magnetization of specimens were subsequently studied. XRD and FTIR were used to investigate structure and composition variations of the samples. All samples were found to have a cubic spinel structure. TEM was used to study morphological variations. The results indicate that the average particle sizes are between 29 35 nm. B-H hysteresis measurement was carried out at room temperature under field of 5 kOe and this measurement with the increase of Co2 concentration yields the monotonic increase of saturation magnetization MS and coercive field HC . Ferrites with such behavior are important for magnetic recording media microwave applications environment and medical biology 1-3 . In view of this we have studied the various properties of Co doped Ni ferrite. 1. Introduction NiFe2O4 has cubic inverse spinel structure with Ni2 ions occupy octahedral B - site and Fe3 ions occupy both tetrahedral A - sites and octahedral B - sites 4 . Nickel ferrite has been prepared by standard ceramic route. That are particle size micrometer low saturation magnetization and low coercivity. To our knowledge the systematic investigation of the magnetic and electrical properties of Ni1-XCoX Fe2O4 with x varied from 0 to in steps of has not been reported so far. Further Ni-Co ferrite shows the good .

• Báo cáo khoa học
• cobalt substitution
• Mathematics
• Physics
• Scientific reports
• scientific studies
• natural sciences
• Giới thiệu Thư viện số
• Natural Sciences Digital Library
• Thư viện số
• Digital Library
• Bộ sưu tập Thư viện số
• Summary of Doctoral Thesis
• Educational Sciences
• Methodology in Biology
• Developing textbooks’ models
• Orientation of competency development
• Methods of teaching natural science
• Annals of Agricultural Sciences
• Agricultural Sciences
• Khoa học nông nghiệp
• Natural preservatives
• Cold storage
• the natural sciences
• the social sciences
• conduct and misconduct
• Misconduct and why it occurs
• misconduct affecting
• the truth claims
• Molecular cryocrystal
• Elastic moduli
• Elastic wave
• Elastic constants
• Mathematical sciences
• Physical sciences
• Sciences
• GMAT
• math test
• McGraw Hills GMAT
• Environmental sciences
• Earth sciences
• Natural organic matters removal
• Water purification
• DBPs control
• Technology sciences
• Vecny este epoxy alkyd
• Tính chất điện
• Độ bền dung môi
• Độ bền nhiệt
• Detailed checklist
• Field labels
• Grammitid specimens
• VNU University of Science
• Xác định biên
• Dị thường từ
• Dị thường trọng lực
• Bắc Việt Nam
• Mỡ cá tra
• Etyl cacboxylate
• Etyl biodiesel
• Este axit omega 3 6 9
• Phương pháp đồng dung môi
• Đồng dung môi
• Hợp chất chứa dị vòng
• Chất xúc tác
• Phản ứng Sonogashira
• Hợp chất dị vòng năm cạnh
• Phản ứng Click
• Nano đồng
• Nano silica
• Khả năng kháng nấm
• Pyricularia oryzae
• Rhizoctonia solani
• Phân loại thực vật
• Lạng Sơn
• Aspidistra papillata
• Plant taxonomy
• Arachniodes simplicior
• Flora of Vietnam
• New record
• Phản ứng ngưng tụ croton
• Hoạt tính kháng khuẩn
• Chương trình PASS
• Dẫn xuất thiopodand
• Vật liệu nano
• Tính chất quang
• Tính chất từ
• Vật liệu nano HoFeO3
• Cảm biến miễn dịch điện hóa
• Kháng thể IgY
• Virus Newcastle
• Bình phản ứng mini
• Xúc tác lưỡng kim loại Co2Cu2
• CI NEB cơ chế phản ứng
• Phản ứng hydrogen hóa carbon monoxide
• Bọ rùa hai mảng đỏ
• Lemnia biplagiata
• Tỷ lệ sống sót
• Tỷ lệ vào nhộng
• Năng ăn con mồi
• Chất lượng nước
• Động vật nổi
• Thành phần loài
• Kênh Bún Xáng
• Đa dạng sinh học
• Camphor
• science and technology
• research projects
• scientific research
• Natural resources
• Research
• Natural radioactivity
• Major and accessory minerals
• Gamma ray spectrometry
• Wall rock granitoids
• Natural sciences and Technology
• Immune cells expansion
• Peripheral blood
• Immune cell therapy
• Natural killer cells
• Cytotoxic T lymphocytes
• Peripheral blood mononuclear cells