02.04.2007
РОССИЙСКАЯ АКАДЕМИЯ НАУК

УРАЛЬСКОЕ ОТДЕЛЕНИЕ

ИНСТИТУТ ХИМИИ TBEPДОГО ТЕЛА
   
| | | | |
| | | | | |
 02.04.2007   Карта сайта     Language По-русски По-английски
Новые материалы
Экология
Электротехника и обработка материалов
Медицина
Статистика публикаций


02.04.2007



Organic magnetoresistance



29 March 2007



A breakthrough in the understanding of the magnetic properties of organic semiconductors could lead to cheaper tablet PCs. 


In 2004 a group of researchers from the University of Iowa, US, discovered a strange magnetic effect in films of an organic semiconductor. When a small magnetic field was applied to the film, its electrical resistance decreased by around ten per cent. This unusual sensitivity to magnetic fields is known as magnetoresistance, and had only previously been found in ferromagnetic materials like iron. The cause of the phenomenon was a mystery.


 


The organic magnetoresistive effect








The organic magnetoresistive effect is not well understood



 


Now the researchers have taken a step forward in understanding why the magnetoresistance happens. By studying films of a variety of organic semiconductors, they have narrowed down the cause to the combined influence that heavy atoms, such as platinum or iridium, and hydrogen atoms have on electrons in the material. On the atomic scale, the electrical and magnetic responses of materials are strongly linked. Both heavy atoms and hydrogen atoms subtly change the energy levels of electrons in the film, and the interplay of the two effects causes strong magnetoresistance. 


Markus Wohlgenannt, who led the research, said, 'what is particularly nice about our discovery is that is has an immediate potential application in organic LED pen-input displays. These interactive displays will have functions similar to existing personal digital assistants and tablet PCs, where a person uses a magnetic pen to input handwritten data or activate desktop icons. The major advantage of our technology compared to existing technologies is that the light-emitting pixels and the magnetic pen sensors are one and the same element, leading to a significant cost reduction.' 


Clare Boothby




Дизайн и программирование N-Studio 
А Б В Г Д Е Ё Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
  • Chen Wev   honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

  • © 2004-2024 ИХТТ УрО РАН
    беременность, мода, красота, здоровье, диеты, женский журнал, здоровье детей, здоровье ребенка, красота и здоровье, жизнь и здоровье, секреты красоты, воспитание ребенка рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок медицина, клиники и больницы, болезни, врач, лечение, доктор, наркология, спид, вич, алкоголизм православные знакомства, православный сайт творчeства, православные рассказы, плохие мысли, православные психологи рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок