Achieving single domain in rhombohedral and tetragonal Mn‐doped Pb(In_1/2Nb_1/2)‐Pb(Mg_1/3Nb_2/3)‐PbTiO₃ crystals for infrared detecting applications

Abstract

The [111]-oriented rhombohedral Mn-doped 0.15Pb(In 1/2

Compensated pyroelectric infrared detector based on Mn‐doped PIMNT single crystal with enhanced signal stability

“…This was ascribed to the adoption of the compensation element. When the ambient temperature changed, the two chips will generate equal and opposite charges, so it (5) can offset the thermal current generated by the ambient temperature change, making it more stable in harsh temperature applications. 24 In addition, all pyroelectric materials have a piezoelectric effect.…”

“…[17][18][19] The Curie temperature of Mn-doped 0.15Pb(In 1/2 Nb 1/2 )O 3 -0.55Pb(Mg 1/3 Nb 2/3 )O 3 -0.30PbTiO 3 (Mn-PIMNT(15/55/30)) single crystal was 161°C, which was 40°C higher than that of binary Mn-PMNT(74/26). 5,20 Meanwhile, Mn-PIMNT(15/55/30) had a high pyroelectric coefficient of 10.1 × 10 -4 Cm -2 K -1 , a moderate dielectric constant of 526, a very low dielectric loss of 0.03%, and a high F d of 34.1 × 10 −5 Pa −1/2 , much higher than those of other traditional pyroelectric materials. 20 It is known that all pyroelectric materials have piezoelectric properties, so the charge generated by the piezoelectric effect may also be superimposed to the charge generated by the temperature change of the material, which will interfere with the output voltage signal of the PIR detector.…”

“…the vacuum dielectric constant and the relative dielectric constant of the material, respectively. 5 As a new-generation pyroelectric material, (1-x)Pb(Mg 1/3 Nb 2/3 )O 3 -xPbTiO 3 (PMNT) single crystal, has ultra-high pyroelectric coefficient and moderate dielectric constant, coupled with its stable physical and chemical properties. [6][7][8][9] It is expected to improve the performance of existing devices and have a very attractive application prospect in infrared detection and imaging devices.…”

A Two-Step Annealing Method to Enhance the Pyroelectric Properties of Mn:PIMNT Chips for Infrared Detectors

“…The thick unannealed Mn:PIMNT crystals can be described as as-grown crystals, since the crystals have not undergone any post-treatment process. X-ray diffractometry (XRD, Rigaku D/max-2500/PC X-ray Diffractometer, Rigaku Corp., Tokyo, Japan) was used to investigate the crystal structure of the as-grown and annealed Mn:PIMNT crystals using crystal powder [35][36][37]. After sputtering the electrodes, the electrical properties of the Mn:PIMNT crystals with dimensions of 4 mm × 4 mm were measured and calculated [29][30][31].…”

Lead‐free pyroelectric infrared detector based on (Bi1/2Na1/2)TiO3‐BaTiO3 ferroelectric ceramics

“…[1][2][3][4] The core sensitive element of PIR detector is a pyroelectric material and the performance of the material is directly related to the capability of the PIR detector. The performances of pyroelectric materials for PIR applications are characterized by three figures of merits (FOMs), [3][4][5] including voltage response value F v = p/(C v ε 0 ε r ), current response value F i = p/C v , and detection rate value…”