Adiabatic demagnetization refrigeration to millikelvin temperatures with the distorted square lattice magnet NaYbGeO4

被引：19
作者：
Arjun, U. [1 ,2 ]
Ranjith, K. M. [3 ]
Jesche, A. [2 ]
Hirschberger, F. [2 ]
Sarma, D. D. [1 ]
Gegenwart, P. [2 ]
机构：
[1] Indian Inst Sci, Solid State & Struct Chem Unit, Bengaluru 560012, India
[2] Univ Augsburg, Inst Phys, Ctr Elect Correlat & Magnetism, Expt Phys 6, D-86135 Augsburg, Germany
[3] Univ Grenoble Alpes, Lab Natl Champs Magnet Intenses, CNRS, EMFL, F-38042 Grenoble, France
来源：
PHYSICAL REVIEW B | 2023年 / 108卷 / 22期
关键词：
ANTIFERROMAGNET; ABSOLUTE; ADR;
D O I：
10.1103/PhysRevB.108.224415
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the synthesis, characterization, low-temperature magnetic, and thermodynamic measurements of the millikelvin adiabatic demagnetization refrigeration (mK-ADR) candidate material NaYbGeO4 which exhibits a distorted square lattice arrangement of YbO6 magnetic units. Magnetization and specific heat indicate weakly interacting effective spin-1/2 moments below 10 K, with a Curie-Weiss temperature of only 15 mK, that can be polarized by magnetic fields of order 1 T. For the ADR performance test, we start the demagnetization from 5 T at a temperature of -2 K and reach a minimum temperature of 150 mK at zero field. The warming curve indicates a sharp magnetic transition in the heat capacity at 210 mK, implying only weak magnetic frustration. The entropy density of SGS <^> 101 mJ K-1cm-3 and hold time below 2 K of 220 min are competitive while the minimal temperature is higher compared to frustrated Ytterbium-oxide ADR materials studied under similar conditions.
引用
收藏
页数：8
相关论文
共 60 条
[21]  
Jahromi A. E., 2019, GSFC-E-DAA-TN70637
[22]   Large magnetocaloric effect and adiabatic demagnetization refrigeration with YbPt2Sn [J].
Jang, Dongjin ;
Gruner, Thomas ;
Steppke, Alexander ;
Mitsumoto, Keisuke ;
Geibel, Christoph ;
Brando, Manuel .
NATURE COMMUNICATIONS, 2015, 6
[23]   Adiabatic demagnetization cooling well below the magnetic ordering temperature in the triangular antiferromagnet KBaGd(BO3)2 [J].
Jesche, A. ;
Winterhalter-Stocker, N. ;
Hirschberger, F. ;
Bellon, A. ;
Bachus, S. ;
Tokiwa, Y. ;
Tsirlin, A. A. ;
Gegenwart, P. .
PHYSICAL REVIEW B, 2023, 107 (10)
[24]   Spin liquid ground state of the spin-1/2 square J1-J2 Heisenberg model [J].
Jiang, Hong-Chen ;
Yao, Hong ;
Balents, Leon .
PHYSICAL REVIEW B, 2012, 86 (02)
[25]  
Kelley LM, 2003, CHEM ENG-NEW YORK, V110, P8
[26]   Valence Bonds in Random Quantum Magnets: Theory and Application to YbMgGaO4 [J].
Kimchi, Itamar ;
Nahum, Adam ;
Senthil, T. .
PHYSICAL REVIEW X, 2018, 8 (03)
[27]  
Kiutra, Cooling Technology: Solid-state cryogen-free cooling
[28]   Magnetocaloric Properties of R3Ga5O12 (R = Tb, Gd, Nd, Dy) [J].
Kleinhans, M. ;
Eibensteiner, K. ;
Leiner, J. C. ;
Resch, C. ;
Worch, L. ;
Wilde, M. A. ;
Spallek, J. ;
Regnat, A. ;
Pfleiderer, C. .
PHYSICAL REVIEW APPLIED, 2023, 19 (01)
[29]  
Kouzes R. T., 2010, PNNL-19360
[30]   Magnetic order in the S=1/2 two-dimensional molecular antiferromagnet copper pyrazine perchlorate Cu(Pz)2(ClO4)2 [J].
Lancaster, T. ;
Blundell, S. J. ;
Brooks, M. L. ;
Baker, P. J. ;
Pratt, F. L. ;
Manson, J. L. ;
Conner, M. M. ;
Xiao, F. ;
Landee, C. P. ;
Chaves, F. A. ;
Soriano, S. ;
Novak, M. A. ;
Papageorgiou, T. P. ;
Bianchi, A. D. ;
Herrmannsdoerfer, T. ;
Wosnitza, J. ;
Schlueter, J. A. .
PHYSICAL REVIEW B, 2007, 75 (09)
123456