Giant reversible magnetocaloric effect in antiferromagnetic rare-earth cobaltite GdCoO3

被引：25

作者：

Dong, Q. Y. ^{[1
,2
,3
]}

Hou, K. Y. ^{[1
,2
,3
]}

Zhang, X. Q. ^{[3
]}

Su, L. ^{[3
]}

Wang, L. C. ^{[1
,2
]}

Ke, Y. J. ^{[3
,4
]}

Yan, H. T. ^{[1
,2
]}

Cheng, Z. H. ^{[3
,5
]}

机构：

[1] Capital Normal Univ, Ctr Condensed Matter, Beijing 100048, Peoples R China

[2] Capital Normal Univ, Beijing Key Lab Meta Mat & Devices, Dept Phys, Beijing 100048, Peoples R China

[3] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China

[4] Wuhan Univ Technol, Sch Sci, Wuhan 430070, Peoples R China

[5] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2020年 / 127卷 / 03期

基金：

中国国家自然科学基金;

关键词：

STATE; SPIN;

D O I：

10.1063/1.5132864

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated the magnetic properties and magnetocaloric effects in polycrystalline GdCoO3 with a low-spin state of Co3+ ion by magnetization and heat capacity measurements. GdCoO3 shows antiferromagnetic ordering due to the Gd3+ magnetic moments below Neel temperature T-N = 3.1 K. This compound exhibits a giant magnetocaloric effect around T-N. The maximum value of isothermal magnetic entropy change is 39.1 J/kg K, the peak value of adiabatic temperature change is 19.1 K, and the refrigerant capacity is 278 J/kg for a field change of 0-70 kOe around T-N. The large magnetocaloric effect is related to the half-filled 4f electronic state of Gd3+ ions. The giant magnetocaloric effect as well as no hysteresis suggest that GdCoO3 could be a potential refrigerant in low-temperature magnetic refrigeration technology. Published under license by AIP Publishing.

引用

页数：6

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