Magnetic properties of the CeGe1−xSix series studied by powder neutron diffraction and μSR-measurements

Schobinger‐Papamantellos, P.; Kenzelmann, M.; Schenck, A.; Gygax, F. N.; Buschow, K.H.J.; Ritter, C.

doi:10.1016/j.physb.2004.02.004

Cited by 14 publications

(14 citation statements)

References 17 publications

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“…The analysis performed in that work resulted in a magnetic moment of 1.1 μ B , the same as that reported from neutron diffraction [5], which indicates a non-negligible Kondo effect. Indeed, further analysis yields a value for the T K /T N ratio of 0.75.…”

Section: Introductionsupporting

confidence: 80%

“…Estimates of the Kondo temperature from these data are T K ~ 8.1 K and 7.1 K. The jump in specific heat due to the magnetic ordering can be used to estimate the magnetic moment and yields a value of 1.1 μ B in agreement with neutron data [5]. Compared to the free ion value for Ce 3+ of 2.14 μ B this also suggests a very substantial Kondo effect.…”

Section: Introductionmentioning

confidence: 55%

“…This is somewhere in the middle of the range that has been observed. Work on CeSi 1-x Ge x [5] has shown that the introduction of the larger germanium atom into the lattice leads to a volume expansion of the unit cell that is smaller than the extra volume taken up by the germanium, leading to an effective increase of pressure. As x is increased the Néel temperature is increased from ~ 6-10 K as would be expected if the system was following the standard Doniach picture.…”

Section: Temperatures Greater Than the Néel Temperaturementioning

confidence: 99%

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Complex magnetic states of the heavy fermion compound CeGe

Haines

Marcano

Smith

et al. 2012

Low Temperature Physics

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The intermetallic compound CeGe exhibits unusual magnetic behavior due to the interplay between the Kondo and the antiferromagnetic coupling. This particular system is interesting because the Kondo temperature is close to the Néel temperature, resulting in a close competition between the low-temperature interactions, which can be tuned by means of varying external parameters such as pressure and applied magnetic field. Interestingly, magnetization measurements up to 12 kbar reveal that the Néel temperature is not affected by pressure. Measurements of the electrical resistivity, however, show that the sharp upturn appearing below T N is sensitive to pressures up to 15 kbar. This suggests that pressure may change the complex antiferromagnetic spin structure. The validity of an explanation based on the magnetic superzones seen in the rare earths is discussed here. PACS: 71.27.+a Strongly correlated electron systems; heavy fermions; 75.50.-y Studies of specific magnetic materials; 75.50.Ee Antiferromagnetics.

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Section: Introductionsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 55%

Section: Temperatures Greater Than the Néel Temperaturementioning

confidence: 99%

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Complex magnetic states of the heavy fermion compound CeGe

Haines

Marcano

Smith

et al. 2012

Low Temperature Physics

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“…1, where a clear lambda peak can be observed with a jump value of DC mag ¼ 6:7 J=K mol. A simple extrapolation made from the jump value ðDC mag ¼ 12:48 J=K molÞ expected for a free Ce 3þ ion ðm ¼ 2:14 m B Þ results in a magnetic moment of 1:1 m B , the same as that reported from neutron diffraction [3]. We also can use this DC mag value to get an estimate of the Kondo temperature (T K ).…”

mentioning

confidence: 61%

“…It was characterized in the 1960's [1] as a 'simple' antiferromagnet with a pretty well-defined Curie-Weiss law yielding an effective magnetic moment close to that of the free ion value and a Ne´el temperature around 10 K. However, recent studies [2] have evidenced a richer phenomenology on this composition, with an exotic behaviour of its resistivity, due to the formation of a magnetic gap at T N , and a complex spectral mSR response. In contrast with these results, recent study of the CeGe 1Àx Si x magnetic structures [3] reports CeGe as a simple antiferromagnet with a propagation vector of (0,1/2,0) and a total Ce magnetic moment of 1:06 m B , then exhibiting a nonnegligible Kondo effect.…”

mentioning

confidence: 71%