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公开(公告)号:US5914068A
公开(公告)日:1999-06-22
申请号:US765575
申请日:1996-12-30
IPC分类号: C04B35/453 , C30B29/22
CPC分类号: C04B35/453
摘要: Novel Bi-layer Perovskite ferroelectrics constituted of BiO intermediate layers (17) and pseudo-Perovskite layers (18) stacked alternately are disclosed. The Bi-layer Perovskite ferroelectrics have such a crystal structure which has a fundamental skeleton composed of each intermediate layer (17) consisting of one BiO plane and each pseudo-Perovskite structure (18) consisting of Pb(Zr, Ti)O.sub.3. Since the intermediate layer (17) is constituted of the BiO layer, the ferroelectrics are more excellent in ferroelectric characteristics and thermodynamic stability than known Perovskite ferroelectrics comprising a Bi.sub.2 O.sub.2 layer.
摘要翻译: PCT No.PCT / JP95 / 01205 Sec。 371日期1996年12月30日第 102(e)日期1996年12月30日PCT归档1995年6月16日PCT公布。 出版物WO96 / 00704 日期1996年1月11日公开了由交替堆叠的BiO中间层(17)和伪钙钛矿层(18)构成的新型双层钙钛矿型铁电体。 双层钙钛矿铁电体具有这样的晶体结构,其具有由由一个BiO平面构成的每个中间层(17)和由Pb(Zr,Ti)O 3组成的每个假钙钛矿结构(18)组成的基本骨架。 由于中间层(17)由BiO层构成,所以铁电体的铁电特性和热力学稳定性优于包括Bi 2 O 2层的已知钙钛矿型铁电体。
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公开(公告)号:US4840844A
公开(公告)日:1989-06-20
申请号:US56661
申请日:1987-06-02
申请人: Masaaki Futamoto , Yukio Honda , Shinichiro Saito , Takashi Nishimura , Kazuetsu Yoshida , Toyoji Okuwaki , Hitoshi Iwata , Hiroyuki Suzuki , Kazushige Imagawa , Hideo Daimon , Osamu Kitakami , Hideo Fujiwara
发明人: Masaaki Futamoto , Yukio Honda , Shinichiro Saito , Takashi Nishimura , Kazuetsu Yoshida , Toyoji Okuwaki , Hitoshi Iwata , Hiroyuki Suzuki , Kazushige Imagawa , Hideo Daimon , Osamu Kitakami , Hideo Fujiwara
IPC分类号: G11B5/72
CPC分类号: G11B5/72 , Y10S428/90 , Y10T428/265 , Y10T428/30 , Y10T428/31678
摘要: A magnetic recording medium which comprises a non-magnetic substrate, a magnetic film formed on the substrate and a protective film provided on the magnetic film, the protective film being composed of at least two groups of element, the element in one group being at least one of B and C having a smaller atomic size, and a concentration of the element increasing from the interface side of the protective film with the magnetic film toward the opposite face side throughout the protective film has an improved durability against a magnetic head.
摘要翻译: 一种磁记录介质,其包括非磁性基板,形成在所述基板上的磁性膜和设置在所述磁性膜上的保护膜,所述保护膜由至少两组元件组成,一组中的元素至少为 B和C之一具有较小的原子尺寸,并且从保护膜与磁性膜的界面侧朝着保护膜的相对面侧增加的元素的浓度具有改善的对磁头的耐久性。
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