Anisotropic magnetic properties and giant rotating magnetocaloric effect in double-perovskite T b2CoMn O6

J. Y. Moon; M. K. Kim; D. G. Oh; J. H. Kim; H. J. Shin; Y. J. Choi; N. Lee

doi:10.1103/PhysRevB.98.174424

Anisotropic magnetic properties and giant rotating magnetocaloric effect in double-perovskite T b2CoMn O6

J. Y. Moon, M. K. Kim, D. G. Oh, J. H. Kim, H. J. Shin, Y. J. Choi, N. Lee

Department of Physics

Research output: Contribution to journal › Article › peer-review

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Abstract

We investigated the anisotropy of the magnetic and magnetocaloric properties of single-crystalline double-perovskite Tb2CoMnO6, which crystallizes in a monoclinic P21/n structure. Due to dissimilar magnetic anisotropy, the ferromagnetic order of the Co2+ and Mn4+ moments emerges along the c axis at TC=100K, and the larger Tb3+ moments align perpendicular to the c axis, below TTb=15K. The intricate temperature development of the metamagnetism along the c axis results in a large negative change in the magnetic entropy at low temperature. On the other hand, the larger but almost reversible magnetization, perpendicular to the c axis, results in a small and positive entropy change. This highly anisotropic magnetocaloric effect (MCE) leads to a giant rotational MCE, estimated to be 20.8J/kgK. Our findings, based on the magnetic anisotropy in Tb2CoMnO6, enrich fundamental and applied research on magnetic materials, considering the distinct magnetic characteristics of double perovskites.

Original language	English
Article number	174424
Journal	Physical Review B
Volume	98
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.98.174424
Publication status	Published - 2018 Nov 19

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grants No. NRF-2016R1C1B2013709, No. NRF-2017K2A9A2A08000278, No. 2017R1A5A1014862 (SRC program: vdWMRC center), and No. NRF-2018R1C1B6006859. J.Y.M. acknowledges tuition support from the Hyundai Motor Chung Mong-Koo Foundation.

Publisher Copyright:
© 2018 American Physical Society.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.98.174424

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title = "Anisotropic magnetic properties and giant rotating magnetocaloric effect in double-perovskite T b2CoMn O6",

abstract = "We investigated the anisotropy of the magnetic and magnetocaloric properties of single-crystalline double-perovskite Tb2CoMnO6, which crystallizes in a monoclinic P21/n structure. Due to dissimilar magnetic anisotropy, the ferromagnetic order of the Co2+ and Mn4+ moments emerges along the c axis at TC=100K, and the larger Tb3+ moments align perpendicular to the c axis, below TTb=15K. The intricate temperature development of the metamagnetism along the c axis results in a large negative change in the magnetic entropy at low temperature. On the other hand, the larger but almost reversible magnetization, perpendicular to the c axis, results in a small and positive entropy change. This highly anisotropic magnetocaloric effect (MCE) leads to a giant rotational MCE, estimated to be 20.8J/kgK. Our findings, based on the magnetic anisotropy in Tb2CoMnO6, enrich fundamental and applied research on magnetic materials, considering the distinct magnetic characteristics of double perovskites.",

author = "Moon, {J. Y.} and Kim, {M. K.} and Oh, {D. G.} and Kim, {J. H.} and Shin, {H. J.} and Choi, {Y. J.} and N. Lee",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) Grants No. NRF-2016R1C1B2013709, No. NRF-2017K2A9A2A08000278, No. 2017R1A5A1014862 (SRC program: vdWMRC center), and No. NRF-2018R1C1B6006859. J.Y.M. acknowledges tuition support from the Hyundai Motor Chung Mong-Koo Foundation. Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

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doi = "10.1103/PhysRevB.98.174424",

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AU - Moon, J. Y.

AU - Kim, M. K.

AU - Oh, D. G.

AU - Kim, J. H.

AU - Shin, H. J.

AU - Choi, Y. J.

AU - Lee, N.

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) Grants No. NRF-2016R1C1B2013709, No. NRF-2017K2A9A2A08000278, No. 2017R1A5A1014862 (SRC program: vdWMRC center), and No. NRF-2018R1C1B6006859. J.Y.M. acknowledges tuition support from the Hyundai Motor Chung Mong-Koo Foundation. Publisher Copyright: © 2018 American Physical Society.

PY - 2018/11/19

Y1 - 2018/11/19

N2 - We investigated the anisotropy of the magnetic and magnetocaloric properties of single-crystalline double-perovskite Tb2CoMnO6, which crystallizes in a monoclinic P21/n structure. Due to dissimilar magnetic anisotropy, the ferromagnetic order of the Co2+ and Mn4+ moments emerges along the c axis at TC=100K, and the larger Tb3+ moments align perpendicular to the c axis, below TTb=15K. The intricate temperature development of the metamagnetism along the c axis results in a large negative change in the magnetic entropy at low temperature. On the other hand, the larger but almost reversible magnetization, perpendicular to the c axis, results in a small and positive entropy change. This highly anisotropic magnetocaloric effect (MCE) leads to a giant rotational MCE, estimated to be 20.8J/kgK. Our findings, based on the magnetic anisotropy in Tb2CoMnO6, enrich fundamental and applied research on magnetic materials, considering the distinct magnetic characteristics of double perovskites.

AB - We investigated the anisotropy of the magnetic and magnetocaloric properties of single-crystalline double-perovskite Tb2CoMnO6, which crystallizes in a monoclinic P21/n structure. Due to dissimilar magnetic anisotropy, the ferromagnetic order of the Co2+ and Mn4+ moments emerges along the c axis at TC=100K, and the larger Tb3+ moments align perpendicular to the c axis, below TTb=15K. The intricate temperature development of the metamagnetism along the c axis results in a large negative change in the magnetic entropy at low temperature. On the other hand, the larger but almost reversible magnetization, perpendicular to the c axis, results in a small and positive entropy change. This highly anisotropic magnetocaloric effect (MCE) leads to a giant rotational MCE, estimated to be 20.8J/kgK. Our findings, based on the magnetic anisotropy in Tb2CoMnO6, enrich fundamental and applied research on magnetic materials, considering the distinct magnetic characteristics of double perovskites.

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Anisotropic magnetic properties and giant rotating magnetocaloric effect in double-perovskite T b2CoMn O6

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