| ²é¿´: 499 | »Ø¸´: 1 | |||
| ±¾Ìû²úÉú 1 ¸ö ·ÒëEPI £¬µã»÷ÕâÀï½øÐв鿴 | |||
xiehuaiyanľ³æ (СÓÐÃûÆø)
|
[ÇóÖú]
°ïæ·Ò»Ï£¬ÐèÒª¾«×¼µÄ·Ò룬лл
|
||
|
Magnetic hysteresis is studied in the orthoferrites ErFeO3 and TmFeO3 using the single crystal samples of millimeter dimensions. It is shown that in both materials one observes a temperature transition manifesting itself through the temperature hysteresis of the magnetic moment and a peculiar temperature evolution of the field hysteresis loop shapes near this transition. Experiments rule out the hypothesis that the ordering of the orthoferrite¡¯s rare-earth magnetic moments plays an important role in these phenomena. The hysteresis curves can be explained by a few-domain magnetic state of the samples that results from the weak ferromagnetism of the orthoferrites. The phenomenon is generic for weak ferromagnets with temperature dependent magnetization. A large characteristic magnetic length makes the behavior of the relatively big samples analogous to that observed in the nanosize samples of strong ferromagnets. |
» ²ÂÄãϲ»¶
²ÄÁÏ»¯¹¤340Çóµ÷¼Á
ÒѾÓÐ4È˻ظ´
Ò»Ö¾Ô¸ÏÃÃÅ´óѧ²ÄÁϹ¤³Ìר˶354ÕÒµ÷¼Á£¡£¡£¡
ÒѾÓÐ6È˻ظ´
271Çóµ÷¼Á
ÒѾÓÐ20È˻ظ´
Ò»Ö¾Ô¸085600ÖпÆÔºÄþ²¨Ëù276·ÖÇóµ÷¼Á
ÒѾÓÐ24È˻ظ´
Ò»Ö¾Ô¸±±½»´ó²ÄÁϹ¤³Ì×Ü·Ö358
ÒѾÓÐ4È˻ظ´
0856²ÄÁÏÓ뻯¹¤µ÷¼Á£¬339
ÒѾÓÐ11È˻ظ´
Ò»Ö¾Ô¸Ö£´ó²ÄÁϹ¤³Ì290Çóµ÷¼Á
ÒѾÓÐ19È˻ظ´
266·Ö£¬Ò»Ö¾Ô¸µçÆø¹¤³Ì£¬±¾¿Æ²ÄÁÏ£¬Çó²ÄÁÏרҵµ÷¼Á
ÒѾÓÐ9È˻ظ´
372·Ö²ÄÁÏÓ뻯¹¤£¨085600£©Ò»Ö¾Ô¸ºþÄÏ´óѧÇóµ÷¼Á
ÒѾÓÐ3È˻ظ´
Ò»Ö¾Ô¸ÄÏʦ´ó0703»¯Ñ§ 275Çóµ÷¼Á
ÒѾÓÐ6È˻ظ´
Uniaxial
½û³æ (ÖøÃûдÊÖ)
- ·ÒëEPI: 48
- Ó¦Öú: 11 (СѧÉú)
- ½ð±Ò: 48.7
- É¢½ð: 118
- ºì»¨: 5
- ɳ·¢: 3
- Ìû×Ó: 1381
- ÔÚÏß: 277.1Сʱ
- ³æºÅ: 1767741
- ×¢²á: 2012-04-20
- ÐÔ±ð: GG
- רҵ: ²¡Ô΢ÉúÎïÓë¸ÐȾÆäËû¿ÆÑ§
¡¾´ð°¸¡¿Ó¦Öú»ØÌû
¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
°®ÓëÓêÏÂ: ½ð±Ò+1 2013-12-03 07:52:50
xiehuaiyan: ½ð±Ò+15, ·ÒëEPI+1, ¡ïÓаïÖú, ·ÒëµÄ²»¹»×¼È· 2013-12-03 11:11:27
°®ÓëÓêÏÂ: ½ð±Ò+1 2013-12-03 07:52:50
xiehuaiyan: ½ð±Ò+15, ·ÒëEPI+1, ¡ïÓаïÖú, ·ÒëµÄ²»¹»×¼È· 2013-12-03 11:11:27
|
Magnetic hysteresis is studied in the orthoferrites ErFeO3 and TmFeO3 using the single crystal samples of millimeter dimensions. ¶ÔÔÚÄÉÃ׳ߴçϵÄÕýÑõÌåErFeO3ºÍ TmFeO3µÄµ¥¾§ÑùÆ·µÄÑо¿ÏÔʾÁ½ÖÖ²ÄÁÏ It is shown that in both materials one observes a temperature transition manifesting itself through the temperature hysteresis of the magnetic moment and a peculiar temperature evolution of the field hysteresis loop shapes near this transition. ÏÔʾÁ½ÖÖ²ÄÁÏËüÃǶ¼·þ´ÓζÈת»»À´ÏÔʾ×Ô¼ºµÄ´æÔÚ,ͨ¹ýζȳÙÖÍ(´Å¾ØµÄζȳÙÖÍ)ºÍÒ»ÖÖÆæÌصÄζȱ仯(¿¿½üÕâ¸öת»»µÄ´ÅÖÍ»ØÏßÐγɵÄ) Experiments rule out the hypothesis that the ordering of the orthoferrite¡¯s rare-earth magnetic moments plays an important role in these phenomena. ʵÑéÅųýÁËij¸ö¼ÙÉè,Õâ¸ö¼ÙÉèÊÇÕýÑõÌåÖи÷Ï¡ÍÁ´Å¾ØµÄ˳ÐòÊÇÔÚÕâ¸öÏÖÏóÖÐÆðÖØÒª×÷ÓÃ. The hysteresis curves can be explained by a few-domain magnetic stateof the samples that results from the weak ferromagnetism of the orthoferrites. ´Ë´ÅÖÍ»ØÏß¿ÉÒÔÕâÑù½âÊÍ,ÑùÆ·ÖеÄÉÙÁ¿µÄ´Å³ë״̬ԴÓÚÕýÑõÌúµÄÈõÌú´ÅÐÔ. [×¢:???] The phenomenon is generic for weak ferromagnets with temperature dependent magnetization. ´ËÏÖÏóÊÇÒ»°ãµÄ,¶ÔÓÚÈõÌú´ÅÌå˵µÄ,ËüÃÇÓµÓÐÒÀÀµÓÚζȵĴÅÐÔ. A large characteristic magnetic length makes the behavior of the relatively big samples analogous to that observed in the nanosize samples of strong ferromagnets. Ò»¸öºÜ³¤µÄÌØÐÔ´ÅÂ·ÖÆÔìÁËÕâÖÖ½á¹û(Ïà¶Ô´óµÄÑù±¾µÄ±íÏÖÀàËÆÓÚËù¹Û²ìµ½µÄÄÉÃ׳ߴçÇ¿Ìú´ÅÌåµÄÐÐΪ) [½ö¹©²Î¿¼] |
2Â¥2013-12-03 01:28:22














»Ø¸´´ËÂ¥
120