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A STUDY ON THE MAGNETIC PROPERTIES OF THE LITHIUM FERRITE NANOCRYSTALLITES

YANG HUA ZHAO MU-YU HAN DE-HUA WANG JIAN-PING LUO HE-LIE

A STUDY ON THE MAGNETIC PROPERTIES OF THE LITHIUM FERRITE NANOCRYSTALLITES

YANG HUA, ZHAO MU-YU, HAN DE-HUA, WANG JIAN-PING, LUO HE-LIE
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  • Received Date:  20 October 1994
  • Published Online:  05 January 1996

A STUDY ON THE MAGNETIC PROPERTIES OF THE LITHIUM FERRITE NANOCRYSTALLITES

  • 1. (1)吉林大学化学系,长春130023; (2)中国科学院物理研究所,北京100080

Abstract: The magnetic properties of lithium ferrite nanocrystallites ranging from 9.1 to 860 nm have been studied. The specific saturation magnetization σs of these nanocrystallites decrease lineally with the nanocrystallite size.The specific magnetization versus temperature curves (T) and M?ssbauer spectra of sample A (diameter D = 860 nm), sample B (D = 11.8 nm) and sample C (D = 9.1 nm) have been measured. It is found that the Curie temperatures of samples B and C are 50℃ lower than that of sample A. From the σ(T) curve of sample C, it seems that sample C consists of two magnetic phases. These phenomena have been discussed with the superparamagnetism and the surface magnetism of sample C.

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