Multicomponent equiatomic high entropy oxides - synthesis and magneto-electronics properties

• Applicant: Professor Dr.-Ing. Horst Hahn
• Subject Area: Synthesis and Properties of Functional Materials
• Term: from 2018 to 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 400731580

• Final Report Year: 2025

Final Report Abstract

This project explored a new class of materials, known as P-HEOs (Perovskite High-Entropy Oxides), which have the potential to exhibit valuable properties for magneto-electronic applications. These materials are derived from oxide perovskites, which are well known for their diverse physical properties, such as strong electron interactions and magneto-electric effects. P-HEOs are particularly of interest because their unique chemical structure, marked by extreme ionic disorder, may give rise to unexpected magnetic and electronic properties. By exploring how various atomic arrangements, compositions, size effects, and external factors like strain influence these properties, we have gained insights into their potential to advance magneto-electronic technologies.

Publications

• High Entropy and Low Symmetry: Triclinic High-Entropy Molybdates. Inorganic Chemistry, 60(1), 115-123.
  Stenzel, David; Issac, Ibrahim; Wang, Kai; Azmi, Raheleh; Singh, Ruby; Jeong, Jaehoon; Najib, Saleem; Bhattacharya, Subramshu S.; Hahn, Horst; Brezesinski, Torsten; Schweidler, Simon & Breitung, Ben
  
• High-entropy energy materials: challenges and new opportunities. Energy & Environmental Science, 14(5), 2883-2905.
  Ma, Yanjiao; Ma, Yuan; Wang, Qingsong; Schweidler, Simon; Botros, Miriam; Fu, Tongtong; Hahn, Horst; Brezesinski, Torsten & Breitung, Ben
  
• High‐Entropy Metal–Organic Frameworks for Highly Reversible Sodium Storage. Advanced Materials, 33(34).
  Ma, Yanjiao; Ma, Yuan; Dreyer, Sören Lukas; Wang, Qingsong; Wang, Kai; Goonetilleke, Damian; Omar, Ahmad; Mikhailova, Daria; Hahn, Horst; Breitung, Ben & Brezesinski, Torsten
  
• Magnetic properties of high entropy oxides. Dalton Transactions, 50(6), 1973-1982.
  Sarkar, Abhishek; Kruk, Robert & Hahn, Horst
  
• Phase–Property Diagrams for Multicomponent Oxide Systems toward Materials Libraries. Advanced Materials, 33(43).
  Velasco, Leonardo; Castillo, Juan S.; Kante, Mohana V.; Olaya, Jhon J.; Friederich, Pascal & Hahn, Horst
  
• Comprehensive investigation of crystallographic, spin-electronic and magnetic structure of (Co 0.2 Cr 0.2 Fe 0.2 Mn 0.2 Ni 0.2)₃ O₄ : Unraveling the suppression of configuration entropy in high entropy oxides. Acta Materialia, 226, 117581.
  Sarkar, Abhishek; Eggert, Benedikt; Witte, Ralf; Lill, Johanna; Velasco, Leonardo; Wang, Qingsong; Sonar, Janhavika; Ollefs, Katharina; Bhattacharya, Subramshu S.; Brand, Richard A.; Wende, Heiko; de Groot, Frank M.F.; Clemens, Oliver; Hahn, Horst & Kruk, Robert
  
• Determining role of individual cations in high entropy oxides: Structure and reversible tuning of optical properties. Scripta Materialia, 207, 114273.
  Sarkar, Abhishek; Mannava, Pavan Kumar; Velasco, Leonardo; Das, Chittaranjan; Breitung, Ben; Bhattacharya, Subramshu S.; Kruk, Robert & Hahn, Horst
  
• Direct observation of elemental fluctuation and oxygen octahedral distortion-dependent charge distribution in high entropy oxides. Nature Communications, 13(1).
  Su, Lei; Huyan, Huaixun; Sarkar, Abhishek; Gao, Wenpei; Yan, Xingxu; Addiego, Christopher; Kruk, Robert; Hahn, Horst & Pan, Xiaoqing
  
• High Entropy Approach to Engineer Strongly Correlated Functionalities in Manganites. Advanced Materials, 35(2).
  Sarkar, Abhishek; Wang, Di; Kante, Mohana V.; Eiselt, Luis; Trouillet, Vanessa; Iankevich, Gleb; Zhao, Zhibo; Bhattacharya, Subramshu S.; Hahn, Horst & Kruk, Robert
  
• High‐Entropy Sulfides as Electrode Materials for Li‐Ion Batteries. Advanced Energy Materials, 12(8).
  Lin, Ling; Wang, Kai; Sarkar, Abhishek; Njel, Christian; Karkera, Guruprakash; Wang, Qingsong; Azmi, Raheleh; Fichtner, Maximilian; Hahn, Horst; Schweidler, Simon & Breitung, Ben
  
• Hole‐doped high entropy ferrites: Structure and charge compensation mechanisms in (Gd 0.2 La 0.2 Nd 0.2 Sm 0.2 Y 0.2) 1− x Ca x FeO3. International Journal of Applied Ceramic Technology, 20(1), 213-223.
  Eiselt, Luis; Kruk, Robert; Hahn, Horst & Sarkar, Abhishek
  
• P2-type layered high-entropy oxides as sodium-ion cathode materials. Materials Futures, 1(3), 035104.
  Wang, Junbo; Dreyer, Sören L.; Wang, Kai; Ding, Ziming; Diemant, Thomas; Karkera, Guruprakash; Ma, Yanjiao; Sarkar, Abhishek; Zhou, Bei; Gorbunov, Mikhail V.; Omar, Ahmad; Mikhailova, Daria; Presser, Volker; Fichtner, Maximilian; Hahn, Horst; Brezesinski, Torsten; Breitung, Ben & Wang, Qingsong
  
• High Entropy Oxides. Encyclopedia of Materials: Electronics, 536-545. Elsevier.
  Sarkar, Abhishek; Hahn, Horst & Kruk, Robert
  
• High‐Entropy Sulfides as Highly Effective Catalysts for the Oxygen Evolution Reaction. Small Structures, 4(9).
  Lin, Ling; Ding, Ziming; Karkera, Guruprakash; Diemant, Thomas; Kante, Mohana V.; Agrawal, Daisy; Hahn, Horst; Aghassi‐Hagmann, Jasmin; Fichtner, Maximilian; Breitung, Ben & Schweidler, Simon
  
• High‐Throughput Screening of High‐Entropy Fluorite‐Type Oxides as Potential Candidates for Photovoltaic Applications. Advanced Energy Materials, 13(24).
  Kumbhakar, Mukesh; Khandelwal, Anurag; Jha, Shikhar Krishn; Kante, Monaha Veerraju; Keßler, Pirmin; Lemmer, Uli; Hahn, Horst; Aghassi‐Hagmann, Jasmin; Colsmann, Alexander; Breitung, Ben; Velasco, Leonardo & Schweidler, Simon
  
• Strain‐Driven Bidirectional Spin Orientation Control in Epitaxial High Entropy Oxide Films. Advanced Science, 10(27).
  Zhao, Zhibo; Jaiswal, Arun Kumar; Wang, Di; Wollersen, Vanessa; Xiao, Zhengyu; Pradhan, Gajanan; Celegato, Federica; Tiberto, Paola; Szymczak, Maria; Dabrowa, Juliusz; Waqar, Moaz; Fuchs, Dirk; Pan, Xiaoqing; Hahn, Horst; Kruk, Robert & Sarkar, Abhishek
  
• High-entropy materials for energy and electronic applications. Nature Reviews Materials, 9(4), 266-281.
  Schweidler, Simon; Botros, Miriam; Strauss, Florian; Wang, Qingsong; Ma, Yanjiao; Velasco, Leonardo; Cadilha Marques, Gabriel; Sarkar, Abhishek; Kübel, Christian; Hahn, Horst; Aghassi-Hagmann, Jasmin; Brezesinski, Torsten & Breitung, Ben
  
• Multifunctional high-entropy materials. Nature Reviews Materials, 9(12), 846-865.
  Han, Liuliu; Zhu, Shuya; Rao, Ziyuan; Scheu, Christina; Ponge, Dirk; Ludwig, Alfred; Zhang, Hongbin; Gutfleisch, Oliver; Hahn, Horst; Li, Zhiming & Raabe, Dierk
  
• Strained single crystal high entropy oxide manganite thin films. Applied Physics Letters, 125(1).
  Zhao, Zhibo; Waqar, Moaz; Jaiswal, Arun Kumar; Raghavan, Aaditya Rangan; Fuchs, Dirk; Lin, Jing; Brezesinski, Torsten; Bhattacharya, Subramshu S.; Hahn, Horst; Pan, Xiaoqing; Kruk, Robert & Sarkar, Abhishek