Spin wave device

A spin wave device comprising:

• an input interconnect transmitting an input impulse signal;
• a multilayer film including a foundation layer;
• a first magnetic layer formed on the multilayer film, the first magnetic layer generating spin waves when receiving the input impulse signal, the spin waves propagating through the first magnetic layer;
• a plurality of input electrodes arranged in a straight line on the first magnetic layer, the input electrodes being connected to the input interconnect, the input electrodes transmitting the input impulse signal to the first magnetic layer;
• and
• a plurality of sensing electrodes sensing the spin waves having propagated through the first magnetic layer, the sensing electrodes being arranged on the first magnetic layer, the sensing electrodes being located at different distances from one another from the straight line having the input electrodes arranged therein, wherein the following equation is satisfied:
• d=Vg×t0
• where n (n≧2) represents the number of the sensing electrodes, L, represents a distance of the ith (n≧i≧1) sensing electrode from the straight line, Vg represents a group velocity of the spin waves, t0 represents a pulse period of the input impulse signal, and d represents a distance between the ith (n−1≧i≧1) sensing electrode and the (i+1)th sensing electrode adjacent to the ith sensing electrode in a direction perpendicular to the straight line.