Basal plane ferromagnetism in the rhombohedral manganite La0.85Ag0.15MnO3+delta

Larsen C. B., Samothrakitis S., Fortes A. D., Ayas A. O., Akyol M., Ekicibil A., ...Daha Fazla

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, cilt.498, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 498
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.jmmm.2019.166192
  • Dergi Adı: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Magnetocaloric effect, Neutron powder diffraction, Manganite, EQUAL-TO-X, MAGNETORESISTANCE, NONSTOICHIOMETRY, VISUALIZATION, SR
  • Çukurova Üniversitesi Adresli: Evet

Özet

The structural and magnetic properties of silver-doped lanthanum manganite, La0.85Ag0.15MnO3+delta, delta = 0.10(2), have been studied using magnetometry and high-resolution neutron powder diffraction. The structural space group is found to be predominantly R (3) over barc, with a minor (5%) fraction of Pnma phase. This phase fraction does not change in the measured temperature range of 4 K to 300 K. Our high-resolution diffraction data allow a detailed analysis of the spin orientation. Using representational analysis, we find the ferromagnetic state below T-c = 246 K has spins oriented perpendicular to the rhombohedral c-axis and is purely ferromagnetic i.e. no canting between sublattices is observed. Implications for the magnetocaloric effect are discussed.