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Magnetic order and crystalline electric field excitations of the quantum critical heavy-fermion ferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Ce</mml:mi><mml:msub><mml:mi>Rh</mml:mi><mml:mn>6</mml:mn></mml:msub><mml:msub><mml:mi>Ge</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>

Magnetic order and crystalline electric field excitations of the quantum critical heavy-fermion ferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Ce</mml:mi><mml:msub><mml:mi>Rh</mml:mi><mml:mn>6</mml:mn></mml:msub><mml:msub><mml:mi>Ge</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>

CeRh$_6$Ge$_4$ is an unusual example of a stoichiometric heavy fermion ferromagnet, which can be cleanly tuned by hydrostatic pressure to a quantum critical point. In order to understand the origin of this anomalous behavior, we have characterized the magnetic ordering and crystalline electric field (CEF) scheme of this system. While …