| ²é¿´: 410 | »Ø¸´: 1 | |||
´óÈý³æÄ¾³æ (СÓÐÃûÆø)
|
[½»Á÷]
¡¾ÇóÖú¡¿ÇîÈËÈ«²¿¼Òµ±36G£¬ÇóһƪÎÄÏ× ÒÑÓÐ1È˲ÎÓë
|
|
ʲôҲ²»½²ÁË£¬ÕâÆªÎÄÕÂÕÒÁ˺þÃҲûÕÒµ½£¬ÎªÁ˱íʾ³ÏÒ⣬ȫ²¿¼Òµ±¡£¡£36G·îÉÏÇóһƪÎÄÏס£ ÏêÇ飺 International Journal of Modern Physics B (IJMPB) Volume: 21, Issue: 5(2007) pp. 723-729 DOI: 10.1142/S0217979207036606 Title: CATION DISTRIBUTION OF MnFe2O4 NANOPARTICLES SYNTHESIZED UNDER AN INDUCED MAGNETIC FIELD Author(s): JUN WANG Department of Physics, Ningbo University, Ningbo 315211, People's Republic of China YEJUN WU Department of Physics, Ningbo University, Ningbo 315211, People's Republic of China YUEJIN ZHU Department of Physics, Ningbo University, Ningbo 315211, People's Republic of China History: Received 5 October 2005 Abstract: Nanoparticles of MnFe2O4 have been synthesized under an induced magnetic field by a hydrothermal process. A strong correlation between the cation distribution and the magnetic properties of MnFe2O4 nanoparticles has been identified. From the results of Mössbauer spectroscopy it has been found that the nanoparticles synthesized under zero magnetic fields have 21% inversion occupancy in the tetrahedral sites by Fe3+ cations, while this value decreases to 10% in the sample formed under a 0.25 T magnetic field. The results explain well the decrease in saturation magnetization from 62.2 emu/g to 52.8 emu/g for the sample formed under a magnetic field. This provides an understanding on how to control the inner structure in order to control the magnetic properties of these spinel ferrite nanoparticles. Keywords: Cation distribution; nanoparticles; magnetic properties ºÃÐÄÈËÇë·¢µ½ shybluegg@hotmail.com |
» ²ÂÄãϲ»¶
Äϲýº½¿Õ´óѧ½¯»ª÷ë½ÌÊÚ¿ÎÌâ×éÕÐÊÕ»¯Ñ§¡¢»·¾³¡¢Ì¼´ï·å̼Öкͼ°Ïà¹Ø×¨ÒµË¶Ê¿ÐÅÏ¢
ÒѾÓÐ0È˻ظ´
ºþ±±Ê¦·¶´óѧ¸´ÊÔµ÷¼Á
ÒѾÓÐ0È˻ظ´
ÎÞ»ú»¯Ñ§ÂÛÎÄÈóÉ«/·ÒëÔõôÊÕ·Ñ?
ÒѾÓÐ187È˻ظ´
Î人·ÄÖ¯´óѧ_»¯¹¤Ñ§Ôº¹Ù·½µ÷¼ÁȺ-ԺʿÍŶÓÕÐÉú-ѧÉú×ÔÓɶȸß-ÿ½ì·¢Õ¹ºÃ
ÒѾÓÐ0È˻ظ´
¼ÃÄÏ´óѧ¹ú¼ÒÓÅÇà¿ÎÌâ×é 2026 µ÷¼ÁÕÐÉúÀ´À²
ÒѾÓÐ0È˻ظ´
Î人·ÄÖ¯´óѧ_»¯Ñ§Ôº¹Ù·½µ÷¼ÁȺ-ԺʿÍŶÓÕÐÉú-ѧÉú×ÔÓɶȸ߷¢Õ¹ºÃ-»¶Ó¸÷λͬѧ
ÒѾÓÐ0È˻ظ´
ºÓ±±´óѧ ²ÄÁÏÓ뻯¹¤ ˶ʿÕÐÊÕµ÷¼Á
ÒѾÓÐ0È˻ظ´
Î÷»ª´óѧ »¯Ñ§ µ÷¼ÁÓÐÃû¶î
ÒѾÓÐ0È˻ظ´
» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:
Õâ¸öÎÄÏ×ÌâÄ¿Ôõô·ÒëΪºÃ£¿
ÒѾÓÐ4È˻ظ´
Çóµ°°×´¿»¯·½ÃæµÄÎÄÏ××ÊÁϼìË÷!!
ÒѾÓÐ11È˻ظ´
¿Æ¼¼ÎÄÏ×ÔõôÔĶÁ£¿ÓÈÆäÊÇÓ¢Îĵģ¡Ð»Ð»~
ÒѾÓÐ6È˻ظ´
¡¾ÇóÖú¡¿¹â´ß»¯½µ½â¼×»ù³Èºó¼×»ù³ÈÈÜÒºÖл¹º¬ÓÐÄÄЩÎïÖÊÔªËØ£¬Ôõô²â¶¨
ÒѾÓÐ11È˻ظ´
¡¾ÇóÖú¡¿'Bruker SHELXTL (Bruker, 1997) ÔÚ¾§Ìåѧ±¨Éϲο¼ÎÄÏ×ÊÇʲô£¿
ÒѾÓÐ3È˻ظ´
¶àµÄÈÃÈËÍ·Í´µÄÎÄÏ×ÈçºÎÕûÀí¹éÀ࣬´ó¼Ò³ö³öÖ÷Òâ
ÒѾÓÐ13È˻ظ´
¡¾ÇóÖú¡¿catia µ¼Èëµ½abaqus³öÏÖµÄÎÊÌâ
ÒѾÓÐ7È˻ظ´
¡¾ÇóÖú¡¿µç¶ÆÊµÑéÏÖÏóÖØ¸´²»ÁË
ÒѾÓÐ10È˻ظ´
¡¾ÇóÖú¡¿´ß»¯Ñ§±¨Ïêϸģ°å
ÒѾÓÐ9È˻ظ´
¡¾ÇóÖú¡¿ÈýÊå¶¡»ù좻òÕßÈýÊå¶¡»ù좷úÅðËáÑεĺϳÉ
ÒѾÓÐ6È˻ظ´

lass
гæ (³õÈëÎÄ̳)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 30.2
- ºì»¨: 1
- Ìû×Ó: 34
- ÔÚÏß: 20.3Сʱ
- ³æºÅ: 978117
- ×¢²á: 2010-03-21
- ÐÔ±ð: GG
- רҵ: ²ÄÁÏ

2Â¥2010-12-03 13:07:44














»Ø¸´´ËÂ¥