Elemental substitution effects in multiferroic R Fe2O4 (R: rare earths). Issue 6 (30th March 2015)

• Record Type: Journal Article
• Authors: Yoshii, Kenji; Funae, Takashi; Mizumaki, Masaichiro; Ejiri, Hiroki; Ikeda, Naoshi; Saitoh, Hiroyuki; Matsumura, Daiju; Tsuboi, Nozomu; Wakita, Kazuki; Yamada, Akira; Shirakata, Sho; Wada, Takahiro; Niki, Shigeru; Imaizumi, Mitsuru; Hara, Kazuhiko; Uchitomi, Naotaka
• Is Part Of: Physica status solidi. Volume 12:Issue 6(2015:Jun.)
• Page Start: 841
• Page End: 844
• Publication Date: 2015-03-30
• Subjects: Solid state physics -- Congresses; Solid state physics -- Periodicals; Solid state physics; Conference proceedings; Periodicals; 530.41
• DOI: 10.1002/pssc.201400250
• Languages: English
• ISSNs: 1862-6351

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>We report the effects of elemental substitutions in multiferroic <italic>R</italic> Fe₂O₄ (<italic>R</italic>: Y, Ho‐Lu, In). The substitution by nonmagnetic Ga³⁺ at the Fe site, which has not been reported so far, shows a drastic decrease in the ferrimagnetic transition temperature (<italic>T</italic>_N). This is plausibly owing to the suppression of magnetic interactions between Fe ions, based on our previous results of other substituted systems such as <italic>R</italic> FeCoO₄. Dielectric constants near room temperature were comparable to those of <italic>R</italic> Fe₂O₄. The suppression of dielectric loss in this system is suitable to application. The <italic>R</italic> ‐site substitution was also attempted by the large <italic>R</italic>³⁺ ions such as Dy³⁺. The solubility limit was up to ∼10% of <italic>R</italic> ions. <italic>T</italic>_N was raised by 5‐10 K for Dy³⁺ substitution. (© 2015 WILEY‐VCH Verlag GmbH &amp; Co. KGaA, Weinheim)</p> </abstract>