Physical properties and anisotropies of the RNiGe3 series (R = Y, Ce–Nd, Sm, Gd–Lu)

Mun, Eundeok; Bud’ko, Sergey L.; Ko, Hyunjin; Miller, Gordon J.; Canfield, Paul C.

doi:10.1016/j.jmmm.2010.06.057

Cited by 38 publications

(44 citation statements)

References 48 publications

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“…These results are likely associated with the lanthanide contraction that occurs across the 4f series. In addition, the deficiencies at the Ni site can possibly lead to smaller unit cell volumes as well [17].…”

Section: Crystal Stoichiometry and Structurementioning

confidence: 99%

Anisotropic magnetization and resistivity of single crystalline RNi1−xBi2±y (R=La–Nd, Sm, Gd–Dy)

Lin¹,

Straszheim²,

Bud’ko³

et al. 2013

Journal of Alloys and Compounds

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We present a detailed study of RNi 1−x Bi 2±y (R = La-Nd, Sm, Gd-Dy) single crystals by measurements of stoichiometry and temperature dependent magnetic susceptibility, magnetization, and electrical resistivity. This series forms with partial Ni occupancy as well as a variable Bi occupancy. For R = Ce-Nd, Gd-Dy, the RNi 1−x Bi 2±y compounds show local-moment like behavior and order antiferromagnetically at low temperatures. Determination of anisotropies as well as antiferromagnetic ordering temperatures for RNi 1−x Bi 2±y (R = Ce-Nd, Sm, Gd-Dy) have been made. Although crystalline samples from this family exhibit minority, second phase superconductivity at low temperatures associated with Ni-Bi and Bi contamination, no evidence of bulk superconductivity has been observed.

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Section: Crystal Stoichiometry and Structurementioning

confidence: 99%

Anisotropic magnetization and resistivity of single crystalline RNi1−xBi2±y (R=La–Nd, Sm, Gd–Dy)

Lin¹,

Straszheim²,

Bud’ko³

et al. 2013

Journal of Alloys and Compounds

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“…In addition, the amount of entropy change is relatively small. For the next system, we chose GdNiGe 3 anticipating a weak response to pressure and a large change in entropy (≈ R ln(8)) 34 . This allows us to show that changes of the absolute values of specific heat under pressure are not a result of an artifact due to modified coupling to the bath or within the assembly of sample, heater and thermometer, i.e., due to changing τ 1 and τ 2 .…”

Section: Antiferromagnetic Transition In the Rare-earth Compound Gdnimentioning

confidence: 99%

“…For comparison, we included the literature specific heat data on this compound at ambient pressure, taken from Ref. 34. At all measured pressures, our data nicely reveal the λ-shaped phase transition anomaly at T ≈ 26 K. In addition, we also find a small hump in the specific heat below 10 K. Such a hump in the specific heat at temperatures well below the ordering temperatures was found in various Gd-based systems 36 and was explained by modelling the specific heat of a (2J + 1) multiplet in a mean-field approach 37,38 .…”

Section: Antiferromagnetic Transition In the Rare-earth Compound Gdnimentioning

confidence: 99%

Use of Cernox thermometers in AC specific heat measurements under pressure

Gati

Drachuck

et al. 2019

Review of Scientific Instruments

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We report on the resistance behavior of bare-chip Cernox thermometers under pressures up to 2 GPa, generated in a piston-cylinder pressure cell. Our results clearly show that Cernox thermometers, frequently used in low-temperature experiments due to their high sensitivity, remain highly sensitive even under applied pressure. We show that these thermometers are therefore ideally suited for measurements of heat capacity under pressure utilizing an ac oscillation technique up to at least 150 K. Our Cernox-based system is very accurate in determining changes of the specific heat as a function of pressure as demonstrated by measurements of the heat capacity on three different test cases: (i) the superconducting transition in elemental Pb (T c = 7.2 K), (ii) the antiferromagnetic transition in the rare-earth compound GdNiGe 3 (T N = 26 K) and (iii) the structural/magnetic transition in the ironpnictide BaFe 2 As 2 (T s,N = 130 K). The chosen examples demonstrate the versatility of our technique for measuring the specific heat under pressure of various condensedmatter systems with very different transition temperatures as well as amounts of removed entropy. 1 arXiv:1901.05089v2 [cond-mat.mtrl-sci]

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Section: Crystal Stoichiometry and Structurementioning

confidence: 99%

“…Rare earth (R) compounds have always been of great interest to experimentalists and theorists for their various unusual magnetic, electronic and structural properties [Szytula and Leciejewicz, 1994;Gschneidner and Eyring, 978 ;Bud'ko et al, 1999;Sefat et al, 2008;Mun et al, 2010;Bud'ko and Canfield, 2000]. For the majority of rare-earth elements and compounds, the 4f electrons are shielded from the 5s-, 5p-and 4d -shell electrons, and thus do not participate in chemical bonding.…”

Section: Introductionmentioning

confidence: 99%

Development and exploration of potential routes of discovery of new superconductors

Lin

2013

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Physical properties and anisotropies of the RNiGe3 series (R = Y, Ce–Nd, Sm, Gd–Lu)

Cited by 38 publications

References 48 publications

Anisotropic magnetization and resistivity of single crystalline RNi1−xBi2±y (R=La–Nd, Sm, Gd–Dy)

Anisotropic magnetization and resistivity of single crystalline RNi1−xBi2±y (R=La–Nd, Sm, Gd–Dy)

Use of Cernox thermometers in AC specific heat measurements under pressure

Development and exploration of potential routes of discovery of new superconductors

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