In-situ measurement of irradiation behavior in LiNbO3

Guo, Sha; Harlow, Cole; Chernatynskiy, Aleksandr V.; Daw, Joshua; Khafizov, Marat

doi:10.1016/j.nimb.2020.03.007

Cited by 16 publications

(10 citation statements)

References 37 publications

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“…Thus, most irradiations are done with neutrons with a wide energy range, unless specific filters are interposed [133]. Besides structural characterization performed with neutron scattering, LN crystals mostly with congruent composition were irradiated with fast and/or thermal neutrons with fluences up to 10 20 cm −2 [31,49,[134][135][136][137][138][139][140][141], although with scarce details on the actual neutron spectrum in many cases. An expansion along the c-axis and a shift towards longer wavelengths of the UV absorption edge were reported by Dowell et al [128] for neutron fluences up to 4 × 10 17 cm −2 .…”

Section: Neutron Irradiation Induced Defectsmentioning

confidence: 99%

Unveiling the Defect Structure of Lithium Niobate with Nuclear Methods

Kling

Marques

2021

Crystals

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X-ray and neutron diffraction studies succeeded in the 1960s to determine the principal structural properties of congruent lithium niobate. However, the nature of the intrinsic defects related to the non-stoichiometry of this material remained an object of controversial discussion. In addition, the incorporation mechanism for dopants in the crystal lattice, showing a solubility range from about 0.1 mol% for rare earths to 9 mol% for some elements (e.g., Ti and Mg), stayed unresolved. Various different models for the formation of these defect structures were developed and required experimental verification. In this paper, we review the outstanding role of nuclear physics based methods in the process of unveiling the kind of intrinsic defects formed in congruent lithium niobate and the rules governing the incorporation of dopants. Complementary results in the isostructural compound lithium tantalate are reviewed for the case of the ferroelectric-paraelectric phase transition. We focus especially on the use of ion beam analysis under channeling conditions for the direct determination of dopant lattice sites and intrinsic defects and on Perturbed Angular Correlation measurements probing the local environment of dopants in the host lattice yielding independent and complementary information.

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Section: Neutron Irradiation Induced Defectsmentioning

confidence: 99%

Unveiling the Defect Structure of Lithium Niobate with Nuclear Methods

Kling

Marques

2021

Crystals

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“…To achieve a high-performance SAW device, two parameters, v and p i should be well considered. The S11 parameter is defined as the rate of reflected power and incident power of the device which effectively captures a series of physical processes containing the acoustoelectric conversion and spreads the reflection of SAW [13,14]. The signal output and input of single-ended resonator are accomplished by the same port owing to its performance, which could be characteristic of S11 parameter.…”

Section: Resultsmentioning

confidence: 99%

Influence of Structural Parameters on Performance of SAW Resonators Based on 128° YX LiNbO3 Single Crystal

et al. 2022

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The seeking of resonator with high Q and low insertion loss is attractive for critical sensing scenes based on the surface acoustic wave (SAW). In this work, 128° YX LiNbO3-based SAW resonators were utilized to optimize the output performance through IDT structure parameters. Once the pairs of IDTs, the acoustic aperture, the reflecting grid logarithm, and the gap between IDT and reflector are changed, a better resonance frequency of 224.85 MHz and a high Q of 1364.5 were obtained. All the results demonstrate the structure parameters design is helpful for the performance enhancement with regard to SAW resonators, especially for designing and fabricating high-Q devices.

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“…112,113 Contactbased ultrasonic techniques have also been deployed in ion beam and other radiation environments to observe changes in elasticity and detect irradiationinduced events through acoustic emission, but applications of these methods have been narrow so far. 114,115 Before discussing each of these classes of experiments in turn, we note that by targeting performance characteristics directly, these methods all capture the integrated effects of defect accumulation and microstructure evolution across all defect sizes from the nanoscale to the microscale. While methods such as in situ microscopy must by nature be targeted at one primary length scale of interest (SEM vs. TEM for example), methods which capture material properties directly will integrate the effects of defects at all scales as long as the representative sampling volume remains larger than the scale of individual defects.…”

Section: In Situ Properties Characterization Toolsmentioning

confidence: 99%

The In Situ Ion Irradiation Toolbox: Time-Resolved Structure and Property Measurements

Lang

Dennett

Madden

et al. 2021

JOM

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The dynamic interactions of ions with matter drive a host of complex evolution mechanisms, requiring monitoring on short spatial and temporal scales to gain a full picture of a material response. Understanding the evolution of materials under ion irradiation and displacement damage is vital for many fields, including semiconductor processing, nuclear reactors, and space systems. Despite materials in service having a dynamic response to radiation damage, typical characterization is performed post-irradiation, washing out all information from transient processes. Characterizing active processes in situ during irradiation allows the mechanisms at play during the dynamic ion-material interaction process to be deciphered. In this review, we examine the in situ characterization techniques utilized for examining material structure, composition, and property evolution under ion irradiation. Covering analyses of microstructure, surface composition, and material properties, this work offers a perspective on the recent advances in methods for in situ monitoring of materials under ion irradiation, including a future outlook examining the role of complementary and combined characterization techniques in understanding dynamic materials evolution.

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In-situ measurement of irradiation behavior in LiNbO3

Cited by 16 publications

References 37 publications

Unveiling the Defect Structure of Lithium Niobate with Nuclear Methods

Unveiling the Defect Structure of Lithium Niobate with Nuclear Methods

Influence of Structural Parameters on Performance of SAW Resonators Based on 128° YX LiNbO3 Single Crystal

The In Situ Ion Irradiation Toolbox: Time-Resolved Structure and Property Measurements

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