Ricoh Company, Ltd.

Yoshiko Kurosawa

Toshiyuki Kabata

Toshiaki Tokita

Yoshitaka Hayashi

Toshiyuki Ohsawa

Motoharu Tanaka

Toshishige Fujii

Atsuyuki Watada

Okitoshi Kimura

Nobuo Katagiri

Hiroshi Deguchi

Tomohiro Inoue

Masaetsu Takahashi

Hiroyuki Iechi

Yumiko Suzuki

A negative electrode for a lithium secondary battery includes at least two kinds of carbon materials with a spacing of lattice plane (d.sub.002) of 3.4 .ANG. or less in the direction of the C axis thereof. A lithium secondary battery using this negative electrode is provided.

Negative electrode for lithium secondary battery and lithium secondary

A non-aqueous secondary lithium battery includes a positive electrode; a negative electrode which including at least one component selected from the group consisting of lithium, a lithium alloy, and a host compound which forms an intercalation compound or complex in combination with lithium; and an electrolytic solution or solid electrolyte containing a silicone compound.

Non-aqueous secondary lithium battery

A magneto-optical recording method is capable of carrying out overwriting on a magneto-optical recording medium including a single perpendicular magnetic layer serving as a recording layer, by applying laser beams thereto, thereby controlling the formation and erasure of magnetic domains, in which a magnetic domain with a desired length can be formed or erased by the application of a plurality of laser beams during the formation and erasure of the magnetic domains.

Magneto-optical recording method

A magneto-optical recording medium is composed of a first magnetic layer and a second magnetic layer, which are overlaid, each having a perpendicular magnetic anisotropy, and the first magnetic layer having a Curie temperature of Tc.sub.1, a saturation magnetization of Ms.sub.1, a coercive force of Hc.sub.1, and a thickness of t.sub.1, the second magnetic layer having a compensation temperature of Tcomp.sub.2, a Curie temperature Tc.sub.2, and a coercive force of Hc.sub.2, and which satisfies the relationships:

Magneto-optical recording medium having first and second magnetic layers

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Yokohama, Japan

Yoshiko Kurosawa