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Investigation of the magnetic properties in double perovskite R2CoMnO6 single crystals (R = rare earth: La to Lu)
This content has been downloaded from IOPscience. Please scroll down to see the full text. 2015 J. Phys.: Condens. Matter 27 426002 (http://iopscience.iop.org/0953-8984/27/42/426002) View the table of contents for this issue, or go to the journal homepage for more
Download details: IP Address: 131.173.17.161 This content was downloaded on 03/03/2016 at 07:15
Please note that terms and conditions apply.
Journal of Physics: Condensed Matter J. Phys.: Condens. Matter 27 (2015) 426002 (6pp)
doi:10.1088/0953-8984/27/42/426002
Investigation of the magnetic properties in double perovskite R2CoMnO6 single crystals (R = rare earth: La to Lu) M K Kim, J Y Moon, H Y Choi, S H Oh, N Lee and Y J Choi Department of Physics and IPAP, Yonsei University, Seoul 120–749, Korea E-mail: [email protected] and [email protected] Received 3 July 2015, revised 27 August 2015 Accepted for publication 17 September 2015 Published 7 October 2015 Abstract
We have successfully synthesized the series of the double-perovskite R2CoMnO6 (R = rare earth: La to Lu) single crystals and have investigated their magnetic properties. The ferromagnetic order of Co2+/Mn4+ spins emerges mainly along the c axis. Upon decreasing the size of rare earth ion, the magnetic transition temperature decreases linearly from 204 K for La2CoMnO6 to 48 K for Lu2CoMnO6, along with the enhancement of monoclinic distortion. The temperature and magnetic-field dependences of magnetization reveal the various magnetic characteristics such as the metamagnetic transition in R = Eu, the isotropic nature of rare earth moment in R = Gd, and the reversal of magnetic anisotropy in R = Tb and Dy. Our results offer comprehensive information for understanding the roles of mixed-valent magnetic ions and rare earth magnetic moments on the magnetic properties. Keywords: double perovskite, magnetic properties, magnetic susceptibility (Some figures may appear in colour only in the online journal)
1. Introduction
[24]. Upon decreasing the size of rare earth ions, the magnetic transition temperature decreases gradually, along with the structural distortion [2, 4]. Besides, small portion of additional antiferromagnetic clusters can be formed by another valence state of Co3+- Mn3+ and antisites of ionic disorders and/or antiphase boundaries leading to Co2+- Co2+ or Mn4+- Mn4+ pairs. This often results in the spin-glass state and metamagnetic transitions. In spite of the intriguing physical properties in the series of these compounds, most of the previous studies have been done using the polycrystalline form [7–15, 22, 25–27], preventing detailed characterization of intrinsic properties associated with the crystallographic anisotropy. In this paper, we synthesized the series of double perovskite RCMO single crystals and examined their structural and magnetic properties.
Double perovskites possess a chemical formula of AB1−xB′xO3 (0
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My IOPscience
Investigation of the magnetic properties in double perovskite R2CoMnO6 single crystals (R = rare earth: La to Lu)
This content has been downloaded from IOPscience. Please scroll down to see the full text. 2015 J. Phys.: Condens. Matter 27 426002 (http://iopscience.iop.org/0953-8984/27/42/426002) View the table of contents for this issue, or go to the journal homepage for more
Download details: IP Address: 131.173.17.161 This content was downloaded on 03/03/2016 at 07:15
Please note that terms and conditions apply.
Journal of Physics: Condensed Matter J. Phys.: Condens. Matter 27 (2015) 426002 (6pp)
doi:10.1088/0953-8984/27/42/426002
Investigation of the magnetic properties in double perovskite R2CoMnO6 single crystals (R = rare earth: La to Lu) M K Kim, J Y Moon, H Y Choi, S H Oh, N Lee and Y J Choi Department of Physics and IPAP, Yonsei University, Seoul 120–749, Korea E-mail: [email protected] and [email protected] Received 3 July 2015, revised 27 August 2015 Accepted for publication 17 September 2015 Published 7 October 2015 Abstract
We have successfully synthesized the series of the double-perovskite R2CoMnO6 (R = rare earth: La to Lu) single crystals and have investigated their magnetic properties. The ferromagnetic order of Co2+/Mn4+ spins emerges mainly along the c axis. Upon decreasing the size of rare earth ion, the magnetic transition temperature decreases linearly from 204 K for La2CoMnO6 to 48 K for Lu2CoMnO6, along with the enhancement of monoclinic distortion. The temperature and magnetic-field dependences of magnetization reveal the various magnetic characteristics such as the metamagnetic transition in R = Eu, the isotropic nature of rare earth moment in R = Gd, and the reversal of magnetic anisotropy in R = Tb and Dy. Our results offer comprehensive information for understanding the roles of mixed-valent magnetic ions and rare earth magnetic moments on the magnetic properties. Keywords: double perovskite, magnetic properties, magnetic susceptibility (Some figures may appear in colour only in the online journal)
1. Introduction
[24]. Upon decreasing the size of rare earth ions, the magnetic transition temperature decreases gradually, along with the structural distortion [2, 4]. Besides, small portion of additional antiferromagnetic clusters can be formed by another valence state of Co3+- Mn3+ and antisites of ionic disorders and/or antiphase boundaries leading to Co2+- Co2+ or Mn4+- Mn4+ pairs. This often results in the spin-glass state and metamagnetic transitions. In spite of the intriguing physical properties in the series of these compounds, most of the previous studies have been done using the polycrystalline form [7–15, 22, 25–27], preventing detailed characterization of intrinsic properties associated with the crystallographic anisotropy. In this paper, we synthesized the series of double perovskite RCMO single crystals and examined their structural and magnetic properties.
Double perovskites possess a chemical formula of AB1−xB′xO3 (0
