@article{63660,
  abstract     = {{<jats:p>Adiabatic demagnetization refrigeration (ADR) is regaining relevance for refrigeration to temperatures below 1 K as global helium-3 supply is increasingly strained. While ADR at these temperatures is long established with paramagnetic hydrated salts, more recently, frustrated rare-earth oxides were found to offer higher entropy densities and practical advantages, since they do not degrade under heating or evacuation. We report structural, magnetic, and thermodynamic properties of the rare-earth borates Ba3XB9O18 and Ba3XB3O9 with X = (Yb, Gd). Except for Ba3GdB9O18, which orders at 108 mK, the three other materials remain paramagnetic down to their lowest measured temperatures. ADR performance starting at 2 K in a field of 5 T is analyzed and compared to literature.</jats:p>}},
  author       = {{Klinger, Marvin and Treu, Tim and Kreisberger, Felix and Heil, Christian and Klinger, Anna and Jesche, Anton and Gegenwart, Philipp}},
  issn         = {{2076-3417}},
  journal      = {{Applied Sciences}},
  number       = {{1}},
  publisher    = {{MDPI AG}},
  title        = {{{Sub-1 K Adiabatic Demagnetization Refrigeration with Rare-Earth Borates Ba3XB9O18 and Ba3XB3O9, X = (Yb, Gd)}}},
  doi          = {{10.3390/app16010290}},
  volume       = {{16}},
  year         = {{2025}},
}

@article{61328,
  author       = {{Wang, Zhuoqun and Cui, Xueling and Treu, Tim and Guo, Jiesen and Liu, Xinyang and Klinger, Marvin and Heil, Christian and Ma, Nvsen and Sheng, Xianlei and Deng, Zheng and Lu, Xingye and Wang, Xiancheng and Li, Wei and Gegenwart, Philipp and Jin, Changqing and Zhao, Kan}},
  issn         = {{2475-9953}},
  journal      = {{Physical Review Materials}},
  number       = {{9}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Antiferromagnetic ordering and critical behavior induced giant magnetocaloric effect in distorted kagome lattice <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">G</mml:mi><mml:msub><mml:mi mathvariant="normal">d</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mi>BW</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>9</mml:mn></mml:msub></mml:mrow></mml:math>}}},
  doi          = {{10.1103/7l6y-hdw5}},
  volume       = {{9}},
  year         = {{2025}},
}