Hyperfine Magnetic Field at <SUP>55</SUP>Mn in Ferromagnetic Perovskites REMn<SUB>0.5</SUB>(Ni<SUB>1−<I>x</I></SUB>Mg<I><SUB>x</SUB></I>)<SUB>0.5</SUB>O<SUB>3</SUB> with RE=La, Pr, Nd, and Eu: RE Dependence of Supertransferred Hyperfine Interaction

• Kawakami Takafumi

  Department of Applied Physics and Chemistry, The University of Electro-Communications

• Enoshita Shumpei

  Department of Applied Physics and Chemistry, The University of Electro-Communications

• Kamogawa Masafumi

  Department of Applied Physics and Chemistry, The University of Electro-Communications

• Kobayashi Yoshihiko

  Department of Applied Physics and Chemistry, The University of Electro-Communications

• Asai Kichizo

  Department of Applied Physics and Chemistry, The University of Electro-Communications

Bibliographic Information

Other Title

• Hyperfine magnetic field at 55Mn in ferromagnetic perovskites REMn0.5(Ni1-xMg[x])0.5O3 with RE = La, Pr, Nd, and Eu: RE dependence of supertransferred hyperfine interaction
• Hyperfine Magnetic Field at ⁵⁵Mn in Ferromagnetic Perovskites REMn_0.5(Ni_1-<i>x</i>Mg_<i>x</i>)_0.5O₃ with RE=La, Pr, Nd, and Eu: RE Dependence of Supertransferred Hyperfine Interaction

Abstract

The hyperfine magnetic field at ⁵⁵Mn in ferromagnetically ordered double perovskites of the form REMn_0.5(Ni_1−xMg_x)_0.5O₃ with RE=La, Pr, Nd, and Eu were measured by NMR at 1.8 K. The hyperfine magnetic field H_HF,Mn⁴⁺, which arises from (3dε)³ unpaired electrons in Mn⁴⁺ to which ⁵⁵Mn belongs, is −294.5 kOe independent of RE species. On the other hand, H_STHF supertransferred from 3d_3z²−r² unpaired electrons in the neighboring Ni²⁺ ions decreases as RE goes from La (+35.8 kOe) to Eu (+20.1 kOe). The RE dependence arises from the reduction in the covalency of the Mn⁴⁺–O²⁻ and Ni²⁺–O²⁻ bonds as RE goes from La to Eu, as well as from the cos²θ-type bond angle dependence of the STHF interaction. With the RE dependence of covalency determined from H_STHF, the superexchange interaction between Mn⁴⁺ and Ni²⁺ depending on RE in the present system has been well interpreted.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 77 (9), 094714-094714, 2008

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• REMn<SUB>0.5</SUB>Ni<SUB>0.5</SUB>O<SUB>3</SUB>
• <SUP>55</SUP>Mn NMR
• supertransferred hyperfine interaction
• covalency
• bond-angle dependence
• ferromagnetic oxides
• double perovskite

Details

• CRID: 1390282679174105344
• NII Article ID: 130005437090
• NII Article ID: 110006933499
• NII Article ID: 210000107435
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.77.094714
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 9646748
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9646748
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.77.094714
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed