de Haas–van Alphen Effect in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow><mml:mi>ZrZn</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:math>under Pressure: Crossover between Two Magnetic States

Kimura, Noriaki; Endo, M.; Isshiki, Takaaki; Minagawa, S.; Ochiai, Akira; Aoki, Haruyoshi; Terashima, Taichi; Uji, S.; Matsumoto, Takehiko; Lonzarich, G. G.

doi:10.1103/physrevlett.92.197002

Cited by 49 publications

(44 citation statements)

References 21 publications

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“…Other scenarios are also possible. One intriguing possibility is that spark erosion creates strained layers near the surface which are superconducting 16 . A feature of the spark-erosion-induced superconducting layer in ZrZn 2 is its large critical field to critical temperature ratio.…”

Section: Discussionmentioning

confidence: 99%

Superconductivity induced by spark erosion inZrZn2

et al. 2005

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We show that the superconductivity observed recently in the weak itinerant ferromagnet ZrZn2 [C. Pfleiderer et al., Nature (London) 412, 58 (2001)] is due to remnants of a superconducting layer induced by spark erosion. Results of resistivity, susceptibility, specific heat and surface analysis measurements on high-quality ZrZn2 crystals show that cutting by spark erosion leaves a superconducting surface layer. The resistive superconducting transition is destroyed by chemically etching a layer of 5 µm from the sample. No signature of superconductivity is observed in ρ(T ) of etched samples at the lowest current density measured, J = 675 Am −2 , and at T ≥ 45 mK. EDX analysis shows that spark-eroded surfaces are strongly Zn depleted. The simplest explanation of our results is that the superconductivity results from an alloy with higher Zr content than ZrZn2.

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Section: Discussionmentioning

confidence: 99%

Superconductivity induced by spark erosion inZrZn2

et al. 2005

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“…The conclusion drawn from the work on ZrZn 2 is related to the peculiar structure of the density of states near the Fermi level, notably there being a pronounced maximum in the vicinity of E F . 9,36 The suppression of the magnetic order in weak transition-metal magnets as function of temperature at ambient pressure is essentially driven by a broadening of the density of states (DOS) due to thermal fluctuations. Although hydrostatic pressure also acts to broaden the DOS via increased d-electron overlap, this transition in discontinuous, i.e., temperature and pressure suppress the magnetic order in a different fashion.…”

Section: Discussionmentioning

confidence: 99%

Suppression of ferromagnetism inCeSi1.81under temperature and pressure

et al. 2006

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We have studied the pressure dependence of the magnetization of single crystalline CeSi1.81. At ambient pressure ferromagnetism develops below TC = 9.5 K. Below ∼ 5 K an additional shoulder in low-field hysteresis loops and a metamagnetic crossover around 4 T suggest the appearance of an additional magnetic modulation to the ferromagnetic state. The suppression of the magnetic order in CeSi1.81 as function of temperature at ambient pressure and as function of pressure at low temperature are in remarkable qualitative agreement. The continuous suppression of the ordered moment at pc ≈ 13.1 kbar suggests the existence of a ferromagnetic quantum critical point in this material.

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“…It will be interesting to perform similar studies on LaCrGe 3 . Besides UGe 2 and LaCrGe 3 , two ferromagnetic states have also been reported in ZrZn 2 [34]. In UCoAl, the anomaly corresponding to the field induced transition to the FM state shows two peaks in the ac susceptibility [35] and two kinks forming a plateau in electrical resistivity [36].…”

Section: Quantum Wingmentioning

confidence: 99%

Ferromagnetic quantum criticality: New aspects from the phase diagram of LaCrGe3

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Kaluarachchi

Bud’ko

et al. 2018

Physica B: Condensed Matter

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Recent theoretical and experimental studies have shown that ferromagnetic quantum criticality is always avoided in clean systems. Two possibilities have been identified. In the first scenario, the ferromagnetic transition becomes of the first order at a tricritical point before being suppressed. A wing structure phase diagram is observed indicating the possibility of a new type of quantum critical point under magnetic field. In a second scenario, a transition to a modulated magnetic phase occurs. Our recent studies on the compound LaCrGe 3 illustrate a third scenario where not only a new magnetic phase occurs, but also a change of order of the transition at a tricritical point leading to a wing-structure phase diagram. Careful experimental study of the phase diagram near the tricritical point also illustrates new rules near this type of point.

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de Haas–van Alphen Effect inZrZn2under Pressure: Crossover between Two Magnetic States

Cited by 49 publications

References 21 publications

Superconductivity induced by spark erosion inZrZn2

Superconductivity induced by spark erosion inZrZn2

Suppression of ferromagnetism inCeSi1.81under temperature and pressure

Ferromagnetic quantum criticality: New aspects from the phase diagram of LaCrGe3

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