Abstract: The present invention relates to a spin-orbit torque magnetic device and a method of manufacturing the same. The spin-orbit torque magnetic device according to one embodiment may include a first heavy metal layer, a ferromagnetic layer formed on the first heavy metal layer, a second heavy metal layer formed on the ferromagnetic layer, and a gate oxide layer formed on the second heavy metal layer. Here, in the second heavy metal layer, when a gate voltage of a preset magnitude is applied to the gate oxide layer, the strength of spin-orbit interaction may be controlled.

Abstract: The present invention relates to a rotation detecting device for a recording and reproducing apparatus and a method therefor which can easily precisely detect a reel rotation speed by a detecting sensor during a high or low speed rotation, by forming in a series equational division method a wing unit and a space unit of a sensor detecting member.

Abstract: A structure for pressing a cassette in a magnetic record and playback machine which includes a cassette holder having guide posts containing fixing slots on both lateral sides of the cassette holder, a driving arm having concave slots in which the guide posts are inserted, and an elastic supporting member surrounding the upper side and both lateral sides of the cassette holder. The upper part of the elastic supporting member has one or more folds which extend downward and both ends of the elastic supporting member are placed in the fixing slots of the guide posts, and both ends of the elastic supporting member are inserted into the concave slots of the driving arm along with the guide posts.