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1. Tuning In-Plane Magnetic Anisotropy and Interfacial Exchange Coupling in Epitaxial La _2/3 Sr _1/3 CoO ₃ /La _2/3 Sr _1/3 MnO ₃ Heterostructures

   https://doi.org/10.1021/acsami.3c10376  

   Feng, Mingzhen; Ahlm, Nolan; Sasaki, Dayne Y.; Chiu, I-Ting; N’Diaye, Alpha T.; Shafer, Padraic; Klewe, Christoph; Mehta, Apurva; Takamura, Yayoi (November 2023, ACS Applied Materials & Interfaces)
2. In ₂ Se ₃ , In ₂ Te ₃ , and In ₂ (Se,Te) ₃ Alloys as Photovoltaic Materials

   https://doi.org/10.1021/acs.jpclett.2c02975  

   Li, Wei; Cai, Xue-Fen; Valdes, Nicholas; Wang, Tianshi; Shafarman, William; Wei, Su-Huai; Janotti, Anderson (December 2022, The Journal of Physical Chemistry Letters)
3. Growth mode and strain effect on relaxor ferroelectric domains in epitaxial 0.67Pb(Mg _1/3 Nb _2/3 )O ₃ –0.33PbTiO ₃ /SrRuO ₃ heterostructures

   https://doi.org/10.1039/D0RA10107A  

   Belhadi, Jamal; Gabor, Urška; Uršič, Hana; Daneu, Nina; Kim, Jieun; Tian, Zishen; Koster, Gertjan; Martin, Lane W.; Spreitzer, Matjaž (January 2021, RSC Advances)

   null (Ed.)

   Controlling the growth of complex relaxor ferroelectric thin films and understanding the relationship between biaxial strain–structural domain characteristics are desirable for designing materials with a high electromechanical response. For this purpose, epitaxial thin films free of extended defects and secondary phases are urgently needed. Here, we used optimized growth parameters and target compositions to obtain epitaxial (40–45 nm) 0.67Pb(Mg 1/3 Nb 2/3 )O 3 –0.33PbTiO 3 /(20 nm) SrRuO 3 (PMN–33PT/SRO) heterostructures using pulsed-laser deposition (PLD) on singly terminated SrTiO 3 (STO) and ReScO 3 (RSO) substrates with Re = Dy, Tb, Gd, Sm, and Nd. In situ reflection high-energy electron diffraction (RHEED) and high-resolution X-ray diffraction (HR-XRD) analysis confirmed high-quality and single-phase thin films with smooth 2D surfaces. High-resolution scanning transmission electron microscopy (HR-STEM) revealed sharp interfaces and homogeneous strain further confirming the epitaxial cube-on-cube growth mode of the PMN–33PT/SRO heterostructures. The combined XRD reciprocal space maps (RSMs) and piezoresponse force microscopy (PFM) analysis revealed that the domain structure of the PMN–33PT heterostructures is sensitive to the applied compressive strain. From the RSM patterns, an evolution from a butterfly-shaped diffraction pattern for mildly strained PMN–33PT layers, which is evidence of stabilization of relaxor domains, to disc-shaped diffraction patterns for high compressive strains with a highly distorted tetragonal structure, is observed. The PFM amplitude and phase of the PMN–33PT thin films confirmed the relaxor-like for a strain state below ∼1.13%, while for higher compressive strain (∼1.9%) the irregularly shaped and poled ferroelectric domains were observed. Interestingly, the PFM phase hysteresis loops of the PMN–33PT heterostructures grown on the SSO substrates (strain state of ∼0.8%) exhibited an enhanced coercive field which is about two times larger than that of the thin films grown on GSO and NSO substrates. The obtained results show that epitaxial strain engineering could serve as an effective approach for tailoring and enhancing the functional properties in relaxor ferroelectrics. 

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4. Gradient chemical order in the relaxor Pb(Mg _1∕3 Nb _2∕3 )O ₃

   https://doi.org/10.1063/1.5016561  

   Cabral, Matthew J.; Zhang, Shujun; Dickey, Elizabeth C.; LeBeau, James M. (February 2018, Applied Physics Letters)
5. Enhanced domain dynamics in alternating current poled rhombohedral Pb(Mg _1/3 Nb _2/3 )O ₃ –PbTiO ₃ single crystals

   https://doi.org/10.1111/jace.20610  

   Sun, Jeong‐Woo; Fluerasu, Andrei; Xu, Zhengze; Liu, Sipan; Lee, Sang‐Goo; Jo, Wook; Jiang, Xiaoning; Ryu, Jong_Eun (April 2025, Journal of the American Ceramic Society)

   Abstract The understanding of domain dynamics in ferroelectric materials is crucial for optimizing their performance in piezoelectric and electro‐optic applications. Although previous studies have focused on static domain structures and macroscopic characteristics, the time‐resolved approach of domains remains largely unexplored. In this study, we compare the dynamic responses of direct current (DC) and alternating current (AC) poled [001]‐oriented rhombohedral Pb(Mg_1/3Nb_2/3)O₃–PbTiO₃(PMN–PT) single crystals using X‐ray photon correlation spectroscopy (XPCS) during the application of external electric fields. Our results demonstrate that the AC‐poled sample exhibit enhanced reconfiguration of domain variants in response to driving fields compared to the DC‐poled counterpart, as evidenced by accelerated correlation decay and faster relaxation time. This phenomenon is attributed to enhanced reversible domain wall motion achieved through AC poling, which facilitates field‐induced domain realignment. These findings provide insight into the relationship between dynamics and macroscopic properties in relaxor‐PT single crystals for high‐performance applications. 

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