| Автор | Manh Do, Hung |
| Автор | Nam Pham, Hong |
| Автор | Chien Nguyen, Van |
| Автор | Bich Hoa Phan, Thi |
| Автор | Lam Tran, Dai |
| Автор | Tuan Nguyen, Anh |
| Автор | Thong Phan, Quoc |
| Автор | Hong Le, Van |
| Автор | Phuc Nguyen, Xuan |
| Дата выпуска | 2011-09-01 |
| dc.description | Magnetic inductive heating (MIH) of nanoparticles (NPs) attracts considerable research attention, first because of its application to hyperthermia in biological tissues. Most reports so far have dealt with magnetite NPs with a Curie temperature, T<sub>C</sub>, of as high as above 500 °C. In this paper, we present results of a MIH study in an ac field of frequency 219 and 236 kHz and strength of 40–100 Oe for several samples of La<sub>0.7</sub>Sr<sub>x</sub>Ca<sub>0.3−x</sub> MnO<sub>3</sub> NPs of T<sub>C</sub> in the region of hyperthermia, that is some tens of degrees above human body temperature. The particle materials were fabricated by a high energy mechanical milling method combined with calcining at various temperatures in the range of 600–900 °C. The heating temperatures of the samples were observed to saturate at a field irradiating time of less than 10 min and at temperatures ranging from 40 to 75 °C depending on the strontium content, the NP concentration, c, and the field parameters. A sudden change in heating rate was clearly revealed in several heating curves for the case of low applied field and low c, which was considered to be related to the onset of a strong decrease in zero-field cooling (ZFC) magnetization of NPs. The initial temperature increase slope, dT/dt, and the saturation temperature, T<sub>s</sub> will be analyzed as dependent on the NP concentration. Field dependences of the specific loss power will be analyzed and discussed for various concentrations, c. Evidence of fluid viscosity influence will also be noted. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | 2011 Vietnam Academy of Science & Technology |
| Название | Magnetic heating characteristics of La<sub>0.7</sub>Sr<sub>x</sub>Ca<sub>0.3-x</sub>MnO<sub>3</sub> nanoparticles fabricated by a high energy mechanical milling method |
| Тип | paper |
| DOI | 10.1088/2043-6262/2/3/035003 |
| Electronic ISSN | 2043-6262 |
| Print ISSN | 2043-6254 |
| Журнал | Advances in Natural Sciences: Nanoscience and Nanotechnology |
| Том | 2 |
| Первая страница | 35003 |
| Последняя страница | 35009 |
| Аффилиация | Manh Do, Hung; Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam |
| Аффилиация | Nam Pham, Hong; Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam |
| Аффилиация | Chien Nguyen, Van; Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam |
| Аффилиация | Bich Hoa Phan, Thi; Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam |
| Аффилиация | Lam Tran, Dai; Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam |
| Аффилиация | Tuan Nguyen, Anh; Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam; Department of Physics, National University of Singapore, 10 Kent Ridge Crescent, 119260 Singapore |
| Аффилиация | Thong Phan, Quoc; Nha Trang Pedagogic College, 1 Nguyen Chanh, Nha Trang, Khanh Hoa, Vietnam |
| Аффилиация | Hong Le, Van; Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam |
| Аффилиация | Phuc Nguyen, Xuan; Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam |
| Выпуск | 3 |
