Adiabatic demagnetization cooling well below the magnetic ordering temperature in the triangular antiferromagnet KBaGd(BO3)2

被引：27

作者：

Jesche, A. ^{[1
]}

Winterhalter-Stocker, N. ^{[1
]}

Hirschberger, F. ^{[1
]}

Bellon, A. ^{[1
]}

Bachus, S. ^{[1
]}

Tokiwa, Y. ^{[1
,2
]}

Tsirlin, A. A. ^{[1
,3
]}

Gegenwart, P. ^{[1
]}

机构：

[1] Univ Augsburg, Inst Phys, Ctr Elect Correlat & Magnetism, EP VI, D-86159 Augsburg, Germany

[2] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[3] Univ Leipzig, Felix Bloch Inst Solid State Phys, D-04103 Leipzig, Germany

来源：

PHYSICAL REVIEW B | 2023年 / 107卷 / 10期

关键词：

Demagnetization - Gadolinium compounds - Magnetic refrigeration - Silver compounds - Temperature - Ytterbium compounds;

D O I：

10.1103/PhysRevB.107.104402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Crystal structure, thermodynamic properties, and adiabatic demagnetization refrigeration (ADR) effect in the spin -72 triangular antiferromagnet KBaGd(BO3)2 are reported. With the average nearest-neighbor exchange coupling of 44 mK, this compound shows magnetic order below TN = 263 mK in zero field. The ADR tests reach the temperature of Tmin = 122 mK, more than twice lower than TN, along with the entropy storage capacity of 192 mJ K-1 cm-3 and the hold time of more than 8 h in the PPMS setup, both significantly improved compared to the spin -21 Yb3+ analog. We argue that KBaGd(BO3)2 shows a balanced interplay of exchange and dipolar couplings that together with structural randomness and geometrical frustration shift Tmin to well below the ordering temperature TN, therefore facilitating the cooling.

引用

页数：8

共 33 条

[1] Realization of quantum dipoles in triangular lattice crystal Ba3Yb(BO3)3 [J].

Bag, Rabindranath ;

Ennis, Matthew ;

Liu, Chunxiao ;

Dissanayake, Sachith E. ;

Shi, Zhenzhong ;

Liu, Jue ;

Balents, Leon ;

Haravifard, Sara .

PHYSICAL REVIEW B, 2021, 104 (22)

[2] PHYSICS Helium-3 Shortage Could Put Freeze On Low-Temperature Research [J].

Cho, Adrian .

SCIENCE, 2009, 326 (5954) :778-779

[3]

Debye P, 1926, ANN PHYS-BERLIN, V81, P1154

[4]

Gegenwart P., 2020, [No title captured], Patent No. [202020002079.6, 2020200020796]

[5] A thermodynamic treatment of certain magnetic effects. A proposed method of producing temperatures considerably below, 1(0) absolute [J].

Giauque, WF .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1927, 49 :1864-1870

[6] Magnetism on ideal triangular lattices in NaBaYb(BO3)2 [J].

Guo, Shu ;

Ghasemi, A. ;

Broholm, C. L. ;

Cava, R. J. .

PHYSICAL REVIEW MATERIALS, 2019, 3 (09)

[7] Triangular Rare-Earth Lattice Materials RbBaR(BO3)2 (R = Y, Gd-Yb) and Comparison to the KBaR(BO3)2 Analogs [J].

Guo, Shu ;

Kong, Tai ;

Xie, Weiwei ;

Nguyen, Loi ;

Stolze, Karoline ;

Cevallos, F. Alex ;

Cava, R. J. .

INORGANIC CHEMISTRY, 2019, 58 (05) :3308-3315

[8] Crystal growth, crystal structure and anisotropic magnetic properties of KBaR(BO3)2 (R= Y, Gd, Tb, Dy, Ho, Tm, Yb and Lu) triangular lattice materials [J].

Guo, Shu ;

Kong, Tai ;

Cevallos, F. Alex ;

Stolze, Karoline ;

Cava, R. J. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2019, 472 :104-110

[9] Challenges and Opportunities for Applications of Unconventional Superconductors [J].

Gurevich, Alex .

ANNUAL REVIEW OF CONDENSED MATTER PHYSICS, VOL 5, 2014, 5 :35-56

[10] SIMPLE VARIATIONAL WAVE-FUNCTIONS FOR TWO-DIMENSIONAL HEISENBERG SPIN-1/2 ANTIFERROMAGNETS [J].

HUSE, DA ;

ELSER, V .

PHYSICAL REVIEW LETTERS, 1988, 60 (24) :2531-2534

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