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Switching magnetic spin states using small magnetic fields in compositionally complex Sm(Ti,Cr,Mn,Fe,Co,Ni,Cu)O3

R. K. Dokala1,*,†, M. Geers2, P. Nordblad1, R. Clulow2,‡, and R. Mathieu1,§

  • 1Department of Materials Science and Engineering, Uppsala University, Box 35, 751 03 Uppsala, Sweden
  • 2Department of Chemistry - Ångström Laboratory, Uppsala University, Box 538, 751 21 Uppsala, Sweden

  • *Present address: Department of Physics, Stockholm University, 106 91 Stockholm, Sweden.
  • †Contact author: ravi.kiran.dokala@fysik.su.se
  • ‡Contact author: rebecca.clulow@kemi.uu.se
  • §Contact author: roland.mathieu@angstrom.uu.se
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Phys. Rev. B 114, 034404 – Published 6 July, 2026

DOI: https://doi.org/10.1103/b77s-6l6d

Abstract

High-entropy perovskites offer a unique platform for exploring magnetic phenomena arising from extreme B-site chemical disorder. In Sm(M7)O3, where there are seven cations in equal amounts at the B site (M=Ti, Cr, Mn, Fe, Co, Ni, Cu), we observe long-range antiferromagnetic ordering near 105 K accompanied by a small but robust excess magnetic moment intrinsic to the chemically disordered lattice. This uncompensated moment is evident from zero-field-cooled – field-cooled irreversibility, shifts in the isothermal M(H) loops, and discrete remanent states identified through direct-current–demagnetization measurements. Remarkably, cooling fields as small as ±20 Oe are sufficient to select the direction of the excess moment, and the chosen magnetic state remains stable against applied fields up to 50 kOe. A low-temperature anomaly in the remanent magnetization further reveals a secondary contribution from the Sm3+ sublattice, although the primary origin of the excess moment resides in the B-site antiferromagnetic sublattice.

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References (29)

  1. A. Tarancon et al., 2026 roadmap on compositionally complex and high entropy materials for energy applications, J. Phys. Energy (2026), doi: 10.1088/2515-7655/ae57d9.
  2. M. Fu, X. Ma, K. Zhao, X. Li, and D. Su, High-entropy materials for energy-related applications, iScience 24, 102177 (2021).
  3. S. Middey, N. Bhattacharya, R. Nevgi, S. C. Joshi, and S. Dey, Extreme compositional complexity in crystalline perovskite oxide: A new paradigm in quantum materials research, Adv. Phys: X 11, 2646243 (2026).
  4. S. Schweidler, M. Botros, F. Strauss, Q. Wang, Y. Ma, L. Velasco, G. C. Marques, A. Sarkar, C. Kübel, H. Hahn, J. A. Hagmann, T. Brezesinski, and B. Breitung, High-entropy materials for energy and electronic applications, Nat. Rev. Mater. 9, 266 (2024).
  5. R. Witte, A. Sarkar, R. Kruk, B. Eggert, R. A. Brand, H. Wende, and H. Hahn, High-entropy oxides: An emerging prospect for magnetic rare-earth transition metal perovskites, Phys. Rev. Mater. 3, 034406 (2019).
  6. C. M. Rost, E. Sachet, T. Borman, A. Moballegh, E. C. Dickey, D. Hou, J. L. Jones, S. Curtarolo, and J. P. Maria, Entropy-stabilized oxides, Nat. Commun. 6, 8485 (2015).
  7. J. Cedervall, R. Clulow, H. L. B. Boström, D. C. Joshi, M. S. Andersson, R. Mathieu, P. Beran, R. I. Smith, J. C. Tseng, M. Sahlberg, P. Berastegui, and S. Shafeie, Phase stability and structural transitions in compositionally complex LnMO3 perovskites, J. Solid State Chem. 300, 122213 (2021).
  8. A. Sarkar, Q. Wang, A. Schiele, M. R. Chellali, S. S. Bhattacharya, D. Wang, T. Brezesinski, H. Hahn, L. Velasco, and B. Breitung, High-entropy oxides: Fundamental aspects and electrochemical properties, Adv. Mater. 31, 1806236 (2019).
  9. P. Pramanik, R. Clulow, D. C. Joshi, A. Stolpe, P. Berastegui, M. Sahlberg, and R. Mathieu, Spin glass states in multicomponent layered perovskites, Sci. Rep. 14, 3382 (2024).
  10. L. Su, H. Huyan, A. Sarkar, W. Gao, Y. X, C. Addiego, R. Kruk, H. Hahn, and X. Pan, Direct observation of elemental fluctuation and oxygen octahedral distortion-dependent charge distribution in high entropy oxides, Nat. Commun. 13, 2358 (2022).
  11. N. Bhattacharya, R. K. Dokala, S. Chowdhury, S. C. Joshi, S. Dey, J. K. Dey, S. Nandy, D. Perez-Salinas, M. Valvidares, M. Hoesch, R. Mathieu, and S. Middey, Mean field magnetism and spin frustration in a double perovskite oxide with compositional complexity, Commun. Mater. 7, 130 (2026).
  12. D. Kinsler-Fedon, Q. Zheng, Q. Huang, E. S. Choi, J. Yan, H. Zhou, D. Mandrus, and V. Keppens, Synthesis, characterization, and single-crystal growth of a high-entropy rare-earth pyrochlore oxide, Phys. Rev. Mater. 4, 104411 (2020).
  13. R. Witte, A. Sarkar, L. Velasco, R. Kruk, R. A. Brand, B. Eggert, K. Ollefs, E. Weschke, H. Wende, and H. Hahn, Magnetic properties of rare-earth and transition metal based perovskite type high entropy oxides, J. Appl. Phys. 127, 185109 (2020).
  14. D. C. Joshi, P. Nordblad, and R. Mathieu, Ferromagnetic excess moments and apparent exchange bias in FeF2 single crystals, Sci. Rep. 9, 18884 (2019).
  15. D. C. Joshi, P. Nordblad, and R. Mathieu, Random fields and apparent exchange bias in the dilute Ising antiferromagnet Fe0.6Zn0.4F2, Sci. Rep. 10, 14588 (2020).
  16. E. Maniv, R. A. Murphy, S. C. Haley, S. Doyle, C. John, A. Maniv, S. K. Ramakrishna, Y. L. Tang, P. Ercius, R. Ramesh, A. P. Reyes, J. R. Long, and J. G. Analytis, Exchange bias due to coupling between coexisting antiferromagnetic and spin-glass orders, Nat. Phys. 17, 525 (2021).
  17. M. J. Benitez, O. Petracic, H. Tuysuz, F. Schuth, and H. Zabel, Fingerprinting the magnetic behavior of antiferromagnetic nanostructures using remanent magnetization curves, Phys. Rev. B 83, 134424 (2011).
  18. Z. Deng et al., Giant exchange-bias-like effect at low cooling fields induced by pinned magnetic domains in Y2NiIrO6 double perovskite, Adv. Mater. 35, 2209759 (2023).
  19. J. Rodríguez-Carvajal, Recent advances in magnetic structure determination by neutron powder diffraction, Physica B 192, 55 (1993).
  20. See Supplemental Material at http://link.aps.org/supplemental/10.1103/b77s-6l6d for EDS data and more magnetometry results.
  21. P. I. Mayo, K. O’Grady, R. W. Chantrell, J. A. Cambridge, I. L. Sanders, T. Yogi, and J. K. Howard, Magnetic measurement of interaction effects in CoNiCr and CoPtCr thin film media, J. Magn. Magn. Mater. 95, 109 (1991).
  22. J. M. D. Coey, Non-collinear spin arrangement in ultra-fine ferrimagnetic crystallites, Phys. Rev. Lett. 27, 1140 (1971).
  23. J. Nogués and I. K. Schuller, Exchange bias, J. Magn. Magn. Mater. 192, 203 (1999).
  24. P. A. Krawczyk, M. Jurczyszyn, J. Pawlak, W. Salamon, P. Baran, A. Kmita, L. Gondek, M. Sikora, C. Kapusta, T. Strączek, J. Wyrwa, and A. Zywczak, High-entropy perovskites as multifunctional metal oxide semiconductors: Synthesis and characterization of (Gd0.2Nd0.2La0.2Sm0.2Y0.2)CoO3, ACS Appl. Electron. Mater. 2, 3211 (2020).
  25. A. R. Mazza, E. Skoropata, Y. Sharma, J. Lapano, T. W. Heitmann, B. L. Musico, V. Keppens, Z. Gai, J. W. Freeland, T. R. Charlton, M. Brahlek, A. Moreo, E. Dagotto, and T. Z. Ward, Designing magnetism in high entropy oxides, Adv. Sci. 9, 2200391 (2022).
  26. B. Musicó, Q. Wright, T. Z. Ward, A. Grutter, E. Arenholz, D. Gilbert, D. Mandrus, and V. Keppens, Tunable magnetic ordering through cation selection in entropic spinel oxides, Phys. Rev. Mater. 3, 104416 (2019).
  27. B. Henne, V. Ney, M. de Souza, and A. Ney, Exchange-bias-like effect of an uncompensated antiferromagnet, Phys. Rev. B 93, 144406 (2016).
  28. H. Ohldag, A. Scholl, F. Nolting, E. Arenholz, S. Maat, A. T. Young, M. Carey, and J. Stöhr, Correlation between exchange bias and pinned interfacial spins, Phys. Rev. Lett. 91, 017203 (2003).
  29. M. Kiwi, Exchange bias theory, J. Magn. Magn. Mater. 234, 584 (2001).

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Phys. Rev. B 114, 034404– Published 6 July, 2026
  • Received 10 February 2026
  • Revised 15 May 2026
  • Accepted 9 June 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by Bibsam.

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