公开(公告)号：US20090184445A1

公开(公告)日：2009-07-23

申请号：US11625839

申请日：2007-01-23

申请人： James Lupton Hedrick ,  Delia Jane Milliron ,  Alshakim Nelson ,  Russell Clayton Pratt

发明人： James Lupton Hedrick ,  Delia Jane Milliron ,  Alshakim Nelson ,  Russell Clayton Pratt

IPC分类号： H05B6/00

CPC分类号： G11B5/845 ,  B22F2998/00 ,  B82Y25/00 ,  B82Y30/00 ,  C08G65/4012 ,  C08G65/4031 ,  C08G65/4037 ,  C08G73/02 ,  C08J5/005 ,  C08J2377/10 ,  C08K3/08 ,  C08K9/10 ,  G11B5/712 ,  H01F1/0054 ,  H01F1/0063 ,  B22F1/0018 ,  B22F1/0062

摘要： A method. The method includes providing Au-doped Co nanoparticles. The nanoparticles include a combination of non-ferromagnetic nanoparticles and weakly ferromagnetic nanoparticles. The nanoparticles each have an exterior surface. The surfaces of the nanoparticles are functionalized with 7-(5-uracil-ylcarbamoyl)heptanoic acid. A polymer is provided having a general formula including a uracil group. A dispersion is formed by agitating a solution of the nanoparticles. The solution is spin cast into a film. The film is heated under vacuum at a first temperature, TFM, resulting in inducing ferromagnetism in the non-ferromagnetic nanoparticles and converting the non-ferromagnetic nanoparticles to ferromagnetic nanoparticles, and resulting in enhancing ferromagnetism in the weakly ferromagnetic nanoparticles. The nanoparticles are aligned such that magnetic easy axes of the nanoparticles are oriented by applying a magnetic field to the dispersion while at a second temperature less than TFM. The axes align in a plane parallel to a plane of the film.

摘要翻译： 一个方法。 该方法包括提供Au掺杂的Co纳米颗粒。 纳米颗粒包括非铁磁纳米颗粒和弱铁磁性纳米颗粒的组合。 纳米颗粒各自具有外表面。 纳米颗粒的表面用7-（5-尿嘧啶基氨基甲酰基）庚酸官能化。 提供具有包括尿嘧啶基团的通式的聚合物。 通过搅拌纳米颗粒的溶液形成分散体。 将溶液旋转成膜。 在第一温度TFM下在真空下加热薄膜，导致在非铁磁性纳米粒子中诱导铁磁性，并将非铁磁性纳米粒子转化为铁磁性纳米粒子，并且导致增强弱铁磁性纳米粒子中的铁磁性。 将纳米颗粒对准，使得通过在低于TFM的第二温度下向分散体施加磁场使得纳米颗粒的易磁化轴取向。 轴线平行于薄膜平面平行。

公开(公告)号：US07854878B2

公开(公告)日：2010-12-21

申请号：US11625839

申请日：2007-01-23

申请人： James Lupton Hedrick ,  Delia Jane Milliron ,  Alshakim Nelson ,  Russell Clayton Pratt

发明人： James Lupton Hedrick ,  Delia Jane Milliron ,  Alshakim Nelson ,  Russell Clayton Pratt

IPC分类号： B29D7/01 ,  H01F1/00 ,  C08J5/18 ,  H05B6/00

CPC分类号： G11B5/845 ,  B22F2998/00 ,  B82Y25/00 ,  B82Y30/00 ,  C08G65/4012 ,  C08G65/4031 ,  C08G65/4037 ,  C08G73/02 ,  C08J5/005 ,  C08J2377/10 ,  C08K3/08 ,  C08K9/10 ,  G11B5/712 ,  H01F1/0054 ,  H01F1/0063 ,  B22F1/0018 ,  B22F1/0062

摘要： A method including providing Au-doped Co nanoparticles. The nanoparticles include a combination of non-ferromagnetic nanoparticles and weakly ferromagnetic nanoparticles. The nanoparticles each have an exterior surface. The surfaces of the nanoparticles are functionalized with 7-(5-uracil-ylcarbamoyl)heptanoic acid. A polymer is provided having a general formula including a uracil group. A dispersion is formed by agitating a solution of the nanoparticles. The solution is spin cast into a film. The film is heated under vacuum at a first temperature, TFM, resulting in inducing ferromagnetism in the non-ferromagnetic nanoparticles and converting the non-ferromagnetic nanoparticles to ferromagnetic nanoparticles, and resulting in enhancing ferromagnetism in the weakly ferromagnetic nanoparticles. The nanoparticles are aligned such that magnetic easy axes of the nanoparticles are oriented by applying a magnetic field to the dispersion while at a second temperature less than TFM. The axes align in a plane parallel to a plane of the film.

摘要翻译： 一种包括提供Au掺杂的Co纳米颗粒的方法。 纳米颗粒包括非铁磁纳米颗粒和弱铁磁性纳米颗粒的组合。 纳米颗粒各自具有外表面。 纳米颗粒的表面用7-（5-尿嘧啶基氨基甲酰基）庚酸官能化。 提供具有包括尿嘧啶基团的通式的聚合物。 通过搅拌纳米颗粒的溶液形成分散体。 将溶液旋转成膜。 在第一温度TFM下在真空下加热薄膜，导致在非铁磁性纳米粒子中诱导铁磁性，并将非铁磁性纳米粒子转化为铁磁性纳米粒子，并且导致增强弱铁磁性纳米粒子中的铁磁性。 将纳米颗粒对准，使得通过在低于TFM的第二温度下向分散体施加磁场使得纳米颗粒的易磁化轴取向。 轴线平行于薄膜平面平行。