Thermal transient effect of Y-cut langanite and langatate

The thermal transient effect of a Y-cut langanite (LGN) resonator and a Y-cut langatate (LGT) resonator is measured with various rates of linear temperature-time ramp. The resonators are vacuum-sealed in two-point-mounted or four-point-mounted enclosures. The nominal frequency of the resonators is 10 MHz 5^th overtone (OT) and the modes from the fundamental to the 7^th OT are measured. The results show an improvement over AT-cut quartz resonators. The dynamic thermal sensitivity coefficient of the 5^th OT two-point-mounted LGT resonator is only 15% of that of 5 MHz 5^th OT AT-cut quartz resonators.