Zobrazeno 1 - 10
of 920
pro vyhledávání: '"P, Gegenwart"'
We present a comprehensive study of the structural, magnetic, and thermodynamic properties, as well as the adiabatic demagnetization refrigeration (ADR) performance of NaGdP$_2$O$_7$. Although NaGdP$_2$O$_7$ exhibits antiferromagnetic ordering at a N
Externí odkaz:
http://arxiv.org/abs/2411.04805
Autor:
Shen, Bin, Insuasti, Efrain, Dhakal, Ramesh, Freund, Friedrich, Gegenwart, Philipp, Winter, Stephen M., Tsirlin, Alexander A.
We use magnetization measurements under pressure along with \textit{ab initio} and cluster many-body calculations to investigate magnetism of the Kitaev candidate Li$_2$RhO$_3$. Hydrostatic compression to 4.2~GPa leads to a decrease in the magnitude
Externí odkaz:
http://arxiv.org/abs/2409.14077
Autor:
Tang, Nan, Gen, Masaki, Rotter, Martin, Man, Huiyuan, Matsuhira, Kazuyuki, Matsuo, Akira, Kindo, Koichi, Ikeda, Akihiko, Matsuda, Yasuhiro H., Gegenwart, Philipp, Nakatsuji, Satoru, Kohama, Yoshimitsu
We present a comprehensive study of the magnetoelastic properties of the Ising pyrochlore oxide Ho$_{2}$Ti$_{2}$O$_{7}$, known as spin ice, by means of high-field magnetostriction measurements and numerical calculations. When a magnetic field is appl
Externí odkaz:
http://arxiv.org/abs/2409.03673
Publikováno v:
Phys. Rev. B 110, 035140 (2024)
The synergy of strong spin-orbit coupling and electron-electron interactions gives rise to unconventional topological states, such as topological Mott insulator, Weyl semimetal, and quantum spin liquid. In this study, we have grown single crystals of
Externí odkaz:
http://arxiv.org/abs/2406.18971
Publikováno v:
J. Phys.: Condens. Matter 37 (2025) 013001
The manifold of energetically degenerate configurations arising from competing interactions in frustrated magnets gives rise to an enhanced entropy at lowest temperatures, which can be utilized for adiabatic demagnetization refrigeration (ADR). We re
Externí odkaz:
http://arxiv.org/abs/2405.15697
The performance of permanent magnets is intricately tied to their magnetic hysteresis loop. In this study, we investigate the heavy-fermion ferromagnet CeAgSb$_2$ through magnetization measurements under uniaxial stress. We observe a 2400 % increase
Externí odkaz:
http://arxiv.org/abs/2404.19320
Autor:
Shen, Bin, Ginga, Victoria A., Arévalo-López, Angel M., Garbarino, Gaston, Uykur, Ece, Goncalves-Faria, Marcos, Mukharjee, Prashanta K., Gegenwart, Philipp, Tsirlin, Alexander A.
Publikováno v:
Phys. Rev. B 109, 224402 (2024)
Pressure evolution of the crystal structure and magnetism of the honeycomb $\alpha$-RuBr$_3$ is studied using high-pressure x-ray diffraction, magnetometry, and density-functional band-structure calculations. Hydrostatic compression transforms antife
Externí odkaz:
http://arxiv.org/abs/2403.17085
Autor:
Mukharjee, Prashanta K., Shen, Bin, Erdmann, Sebastian, Jesche, Anton, Kaiser, Julian, Baral, Priya R., Zaharko, Oksana, Gegenwart, Philipp, Tsirlin, Alexander A.
Publikováno v:
Phys. Rev. B 110, L140407 (2024)
We use magnetometry, calorimetry, and high-resolution capacitive dilatometry, as well as single-crystal neutron diffraction to explore temperature-field phase diagram of the anisotropic honeycomb magnet BaCo$_2$(AsO$_4)_2$. Our data reveal four disti
Externí odkaz:
http://arxiv.org/abs/2403.04466
Publikováno v:
Phys. Rev. B 109, 205152 (2024)
We present electrical resistivity measurements on the prototypical heavy-fermion metal YbRh$_{2}$Si$_{2}$ (YRS) under $a$-axis tensile and compressive strain and focus on the evolution of the resistivity maximum near 136~K that arises from the interp
Externí odkaz:
http://arxiv.org/abs/2402.00630
Publikováno v:
Nature Physics 2024
In magnetic crystals, despite the explicit breaking of time-reversal symmetry, two equilibrium states related by time reversal are always energetically degenerate. In ferromagnets such time-reversal degeneracy can be manifested by hysteresis loops in
Externí odkaz:
http://arxiv.org/abs/2311.14626