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Title: Magnetic properties of double perovskite L n 2 CoIrO 6 ( L n = Eu ,   Tb ,   Ho ) : Hetero-tri-spin 3 d - 5 d - 4 f systems

Abstract

The field of double perovskites is now advancing to three magnetic elements on the A, B and B' sites. A series of iridium-based double perovskite compounds, Ln 2 CoIrO 6 (Ln = Eu, Tb, Ho), with three magnetic elements was synthesized as polycrystalline samples. The compounds crystalize in monoclinic structures with the space group P2 1/n. Magnetic properties of these hetero-tri-spin 3 d-5 d-4 f systems were studied by magnetic susceptibility and field dependent magnetization in both DC and pulsed magnetic fields. All these compounds show ferrimagnetic transitions at temperatures T C above 100 K, which are attributable to antiferromagnetic coupling between Co 2+ and Ir 4+ spins. For Eu 2 CoIrO 6, the magnetic properties are similar to those of La 2CoIrO 6. The Eu 3+ spins show Van Vleck paramagnetism, and do not significantly interact with transition-metal cations. In contrast, Tb 2 CoIrO 6 and Ho 2 CoIrO 6 reveal a second transition to antiferromagnetic order below a lower temperature T N. The temperature-induced ferrimagnetic-to-antiferromagnetic phase transition might be explained by a spin-reorientation transition. Moreover, a magnetic-field-induced spin-flop-like transition with a small hysteresis was observed below T N in these two compounds. The magnetic moments of all threemore » compounds do not saturate up to 60 T at low temperatures. A moderate magnetocaloric effect was also observed in all three compounds. Our results should motivate further investigation of the spin configuration on single crystals of these iridium-based double perovskites.« less

Authors:
ORCiD logo [1];  [2];  [3];  [3];  [3];  [2]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Rutgers Center for Emergent Materials, Piscataway, NJ (United States). Dept. of Physics and Astronomy
  3. Harvey Mudd College, Claremont, CA (United States). Dept. of Physics
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF)
OSTI Identifier:
1494471
Alternate Identifier(s):
OSTI ID: 1493088
Report Number(s):
LA-UR-18-30816
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
89233218CNA000001; DMR-1629059; DMR-1157490; DMR-1644779
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 1; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; High Magnetic Field Science

Citation Formats

Ding, Xiaxin, Gao, Bin, Krenkel, Elizabeth, Dawson, Charles, Eckert, James C., Cheong, Sang-Wook, and Zapf, Vivien. Magnetic properties of double perovskite Ln2CoIrO6 (Ln=Eu, Tb, Ho) : Hetero-tri-spin 3d-5d-4f systems. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.99.014438.
Ding, Xiaxin, Gao, Bin, Krenkel, Elizabeth, Dawson, Charles, Eckert, James C., Cheong, Sang-Wook, & Zapf, Vivien. Magnetic properties of double perovskite Ln2CoIrO6 (Ln=Eu, Tb, Ho) : Hetero-tri-spin 3d-5d-4f systems. United States. doi:10.1103/PhysRevB.99.014438.
Ding, Xiaxin, Gao, Bin, Krenkel, Elizabeth, Dawson, Charles, Eckert, James C., Cheong, Sang-Wook, and Zapf, Vivien. Thu . "Magnetic properties of double perovskite Ln2CoIrO6 (Ln=Eu, Tb, Ho) : Hetero-tri-spin 3d-5d-4f systems". United States. doi:10.1103/PhysRevB.99.014438.
@article{osti_1494471,
title = {Magnetic properties of double perovskite Ln2CoIrO6 (Ln=Eu, Tb, Ho) : Hetero-tri-spin 3d-5d-4f systems},
author = {Ding, Xiaxin and Gao, Bin and Krenkel, Elizabeth and Dawson, Charles and Eckert, James C. and Cheong, Sang-Wook and Zapf, Vivien},
abstractNote = {The field of double perovskites is now advancing to three magnetic elements on the A, B and B' sites. A series of iridium-based double perovskite compounds, Ln2 CoIrO6 (Ln = Eu, Tb, Ho), with three magnetic elements was synthesized as polycrystalline samples. The compounds crystalize in monoclinic structures with the space group P21/n. Magnetic properties of these hetero-tri-spin 3 d-5 d-4 f systems were studied by magnetic susceptibility and field dependent magnetization in both DC and pulsed magnetic fields. All these compounds show ferrimagnetic transitions at temperatures T C above 100 K, which are attributable to antiferromagnetic coupling between Co2+ and Ir4+ spins. For Eu2 CoIrO6, the magnetic properties are similar to those of La2CoIrO6. The Eu3+ spins show Van Vleck paramagnetism, and do not significantly interact with transition-metal cations. In contrast, Tb2 CoIrO6 and Ho2 CoIrO6 reveal a second transition to antiferromagnetic order below a lower temperature TN. The temperature-induced ferrimagnetic-to-antiferromagnetic phase transition might be explained by a spin-reorientation transition. Moreover, a magnetic-field-induced spin-flop-like transition with a small hysteresis was observed below TN in these two compounds. The magnetic moments of all three compounds do not saturate up to 60 T at low temperatures. A moderate magnetocaloric effect was also observed in all three compounds. Our results should motivate further investigation of the spin configuration on single crystals of these iridium-based double perovskites.},
doi = {10.1103/PhysRevB.99.014438},
journal = {Physical Review B},
number = 1,
volume = 99,
place = {United States},
year = {2019},
month = {1}
}

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