Morphology and magnetic properties of ultrafine ZnFe2O4particles

✍ Scribed by T. Sato; K. Haneda; M. Seki; T. Iijima

• Publisher: Springer
• Year: 1990
• Tongue: English
• Weight: 513 KB
• Volume: 50
• Category: Article
• ISSN: 1432-0630
• DOI: 10.1007/bf00323947

✦ Synopsis

Well-crystallized ultrafine ZnFe20 4 particles of several nanometers in size have been prepared by the coprecipitation method, and their particle morphology and magnetic properties, especially at low temperatures, examined. Room-temperature X-ray diffraction, transmission electron microscopy, magnetization measurements at various temperatures from 300 K to 4.2 K, and M6ssbauer spectroscopy at various temperatures from 300 K to 4.2 K, and at 4.2 K with a longitudinal magnetic field of 16.4 kOe applied have been employed. The formation of short-range and long-range magnetic order in small ZnFe204 particles above and below approximately 30 K is discussed. Below 30 K, the appearance of spontaneous magnetization and its hysteretic property is confirmed for small ZnFe204 particles.