Acoustic wave device with spinel layer and temperature compensation layer

A radio frequency module comprising:

• an acoustic wave filter configured to filter a radio frequency signal, the acoustic wave filter including an acoustic wave device that includes a piezoelectric layer, an interdigital transducer electrode, a spinel layer, and a temperature compensating layer disposed between the piezoelectric layer and the spinel layer;
• and
• a package enclosing the acoustic wave filter.

A wireless communication device comprising:

• an antenna;
• and
• a radio frequency front end in communication with the antenna, the radio frequency front end including an acoustic wave filter configured to filter a radio frequency signal, the acoustic wave filter including an acoustic wave device that includes a piezoelectric layer, an interdigital transducer electrode, a spinel layer, and a temperature compensating layer disposed between the piezoelectric layer and the spinel layer.