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Title: Enhancement of magnetodielectric coupling in 6H-perovskites Ba 3 R Ru 2 O 9 for heavier rare-earth cations ( R = Ho , Tb )

Abstract

The role of rare-earth (R) ions in magnetodielectric (MD) coupling is always intriguing and markedly different for different systems. Although many reports are available concerning this aspect in frustrated 3d-transition metal oxides, no such reports exist on higher d (4d/5d)-orbital based systems due to the rare availability of highly insulating 4d/5d systems. Here, we systematically investigated the magnetic, dielectric, ferroelectric, and magnetodielectric behavior of the 6H-perovskites Ba3RRu2O9 for different R-ions, namely R = Sm, Tb, and Ho, which magnetically order at 12, 9.5, and 10.2 K, respectively. For R = Tb and Ho, the temperature and magnetic-field-dependent complex dielectric constant traces the magnetic features, which manifests MD coupling in this system. A weak magnetic-field (H) induced transition is observed for ~30 kOe, which is clearly captured in H-dependent dielectric measurements. No MD coupling is observed for Ba3SmRu2O9. The MD coupling is enhanced by a factor of 3 and 20 times for R = Tb and Ho, respectively, when compared to that of the Nd-counterpart. Here, these results evidence the gradual enhancement of MD coupling with the introduction of heavier R-ions in this series, which is attributed to their larger moment values. Our investigation establishes dominating 4d(Ru)-4ƒ(R) magnetic correlation in thismore » series for the heavier R-members.« less

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [2]; ORCiD logo [4]; ORCiD logo [3];  [2]
  1. Lab. CRISMAT, Caen (France); Michigan State Univ., East Lansing, MI (United States); Univ. of Augsburg, Augsburg (Germany)
  2. Lab. CRISMAT, Caen (France)
  3. Univ. of Augsburg, Augsburg (Germany)
  4. Michigan State Univ., East Lansing, MI (United States)
Publication Date:
Research Org.:
Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1572689
Grant/Contract Number:  
SC0019259
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 11; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Magnetic; Multiferroic; magnetoelectric; Ru-based system

Citation Formats

Basu, Tathamay, Caignaert, Vincent, Ghara, Somnath, Ke, Xianglin, Pautrat, Alain, Krohns, Stephan, Loidl, Alois, and Raveau, Bernard. Enhancement of magnetodielectric coupling in 6H-perovskites Ba3RRu2O9 for heavier rare-earth cations (R=Ho,Tb). United States: N. p., 2019. Web. doi:10.1103/PhysRevMaterials.3.114401.
Basu, Tathamay, Caignaert, Vincent, Ghara, Somnath, Ke, Xianglin, Pautrat, Alain, Krohns, Stephan, Loidl, Alois, & Raveau, Bernard. Enhancement of magnetodielectric coupling in 6H-perovskites Ba3RRu2O9 for heavier rare-earth cations (R=Ho,Tb). United States. https://doi.org/10.1103/PhysRevMaterials.3.114401
Basu, Tathamay, Caignaert, Vincent, Ghara, Somnath, Ke, Xianglin, Pautrat, Alain, Krohns, Stephan, Loidl, Alois, and Raveau, Bernard. Fri . "Enhancement of magnetodielectric coupling in 6H-perovskites Ba3RRu2O9 for heavier rare-earth cations (R=Ho,Tb)". United States. https://doi.org/10.1103/PhysRevMaterials.3.114401. https://www.osti.gov/servlets/purl/1572689.
@article{osti_1572689,
title = {Enhancement of magnetodielectric coupling in 6H-perovskites Ba3RRu2O9 for heavier rare-earth cations (R=Ho,Tb)},
author = {Basu, Tathamay and Caignaert, Vincent and Ghara, Somnath and Ke, Xianglin and Pautrat, Alain and Krohns, Stephan and Loidl, Alois and Raveau, Bernard},
abstractNote = {The role of rare-earth (R) ions in magnetodielectric (MD) coupling is always intriguing and markedly different for different systems. Although many reports are available concerning this aspect in frustrated 3d-transition metal oxides, no such reports exist on higher d (4d/5d)-orbital based systems due to the rare availability of highly insulating 4d/5d systems. Here, we systematically investigated the magnetic, dielectric, ferroelectric, and magnetodielectric behavior of the 6H-perovskites Ba3RRu2O9 for different R-ions, namely R = Sm, Tb, and Ho, which magnetically order at 12, 9.5, and 10.2 K, respectively. For R = Tb and Ho, the temperature and magnetic-field-dependent complex dielectric constant traces the magnetic features, which manifests MD coupling in this system. A weak magnetic-field (H) induced transition is observed for ~30 kOe, which is clearly captured in H-dependent dielectric measurements. No MD coupling is observed for Ba3SmRu2O9. The MD coupling is enhanced by a factor of 3 and 20 times for R = Tb and Ho, respectively, when compared to that of the Nd-counterpart. Here, these results evidence the gradual enhancement of MD coupling with the introduction of heavier R-ions in this series, which is attributed to their larger moment values. Our investigation establishes dominating 4d(Ru)-4ƒ(R) magnetic correlation in this series for the heavier R-members.},
doi = {10.1103/PhysRevMaterials.3.114401},
journal = {Physical Review Materials},
number = 11,
volume = 3,
place = {United States},
year = {Fri Nov 01 00:00:00 EDT 2019},
month = {Fri Nov 01 00:00:00 EDT 2019}
}

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