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Pregled bibliografske jedinice broj: 748927

Strain-Induced Extrinsic High-Temperature Ferromagnetism in the Fe-Doped Hexagonal Barium Titanate


Zorko, Andrej; Pregelj, Matej; Gomilšek, Matej; Jagličić, Zvonko; Pajić, Damir; Telling, Mark; Arčon, Iztok; Mikulska, Iuliia; Valant, Matjaž
Strain-Induced Extrinsic High-Temperature Ferromagnetism in the Fe-Doped Hexagonal Barium Titanate // Scientific Reports, 5 (2015), 7703-1 doi:10.1038/srep07703 (međunarodna recenzija, članak, znanstveni)


Naslov
Strain-Induced Extrinsic High-Temperature Ferromagnetism in the Fe-Doped Hexagonal Barium Titanate

Autori
Zorko, Andrej ; Pregelj, Matej ; Gomilšek, Matej ; Jagličić, Zvonko ; Pajić, Damir ; Telling, Mark ; Arčon, Iztok ; Mikulska, Iuliia ; Valant, Matjaž

Izvornik
Scientific Reports (2045-2322) 5 (2015); 7703-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Diluted magnetic oxides; multiferroics; ferromagnetism; muon spin rotation; electron paramagnetic resonance; magnetization; barium titanate

Sažetak
Diluted magnetic semiconductors possessing intrinsic static magnetism at high temperatures represent a promising class of multifunctional materials with high application potential in spintronics and magneto-optics. In the hexagonal Fe-doped diluted magnetic oxide, 6H-BaTiO_{; ; ; 3-d}; ; ; , room-temperature ferromagnetism has been previously reported. Ferromagnetism is broadly accepted as an intrinsic property of this material, despite its unusual dependence on doping concentration and processing conditions. However, the here reported combination of bulk magnetization and complementary in-depth local-probe electron spin resonance and muon spin relaxation measurements, challenges this conjecture. While a ferromagnetic transition occurs around 700 K, it does so only in additionally annealed samples and is accompanied by an extremely small average value of the ordered magnetic moment. Furthermore, several additional magnetic instabilities are detected at lower temperatures. These coincide with electronic instabilities of the Fe-doped 3C-BaTiO_{; ; ; 3-d}; ; ; pseudocubic polymorph. Moreover, the distribution of iron dopants with frozen magnetic moments is found to be non-uniform. Our results demonstrate that the intricate static magnetism of the hexagonal phase is not intrinsic, but rather stems from sparse strain-induced pseudocubic regions. We point out the vital role of internal strain in establishing defect ferromagnetism in systems with competing structural phases.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
119-1191458-1017 - Nanomagneti (Krešo Zadro, )

Ustanove
Prirodoslovno-matematički fakultet, Zagreb

Autor s matičnim brojem:
Damir Pajić, (234522)

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus
  • MEDLINE


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