2results about How to "Suitable for a wide temperature range" patented technology

The utility model discloses a kind of temperature and humidity test box temperature control system, including first refrigeration cycle unit, first temperature control cycle unit, second refrigeration cycle unit, second temperature control cycle unit and expansion cycle unit, second refrigeration cycle unit and first refrigeration cycle unit are connected in series, first temperature control cycle unit is connected and controls first refrigeration cycle unit, second temperature control cycle unit is connected and controls second refrigeration cycle unit, expansion cycle unit is connected on first, second refrigeration cycle unit.The utility model is suitable for wide temperature range, without heater-80~60 ℃ under condition;Temperature control precision is high, temperature fluctuation degree is ≤±0.02 ℃;Temperature rising speed is fast, compared with traditional mode and improve 10%~50%;Energy efficiency ratio is high, power consumption is small, maximum can save 50% power consumption.

This invention belongs to the field of spintronics technology, and specifically discloses a Hessler alloy with adjustable damping factor and its preparation method. The preparation method includes preparing a Hessler alloy thin film on a substrate; applying a voltage to a piezoelectric ceramic to put the piezoelectric ceramic in a stretched state; attaching the substrate with the Hessler alloy thin film to the stretched piezoelectric ceramic, with the easy magnetization axis direction [110] of the Hessler alloy thin film parallel to the stacking direction of the piezoelectric ceramic; removing the voltage to obtain a Hessler alloy with adjustable damping factor in a compressed state. This invention achieves low-power, reversible control of the damping factor of the Hessler alloy through piezoelectric strain, and is applicable to fields such as magnetic random access memory, spin logic devices, and flexible magnetic sensors.