Metastable vortex states in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>7</mml:mn><mml:mi>−</mml:mi

Radzyner, Y.; Roy, Sthitadhi; Giller, D.; Wolfus, Y.; Shaulov, A.; Chaddah, P.; Yeshurun, Y.

doi:10.1103/physrevb.61.14362

Cited by 42 publications

(55 citation statements)

References 27 publications

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“…These findings are consistent with experiments (for instance, see Ref. [32,33,34,35,36,37,38,42,43,48,49]) and to some extents reconcile previously proposed opposite descriptions ("static" v.s. "dynamic").…”

Section: Magnetisation Loopssupporting

confidence: 92%

“…The present scenario, where off equilibrium phenomena dominate the anomalous low T creep, is supported by the experimental discovery of "aging" in the relaxation [32,35,37,39,46,61,62]. In fact, strong discrepancies are found between "quantum creep theory" predictions [1] and the observed low T relaxation in many compounds [15,56,57].…”

Section: Vortex Mean Square Displacementmentioning

confidence: 52%

“…3). Furthermore, when the parameter κ * = A 1 /A 0 (κ * can be directly related to the Ginzburg-Landau parameter κ = λ/ξ [15]) is high enough, a definite second peak ("fish-tail") appears in M. Very similar magnetisation data are observed in a number of different superconductors from intermediate to high κ values (see, for instance, [3,4,31,32,33,34,35,36,37,38,39,48,50] and references therein).…”

Section: Magnetisation Loopsmentioning

confidence: 71%

“…In particular, in the last few years it has been discovered that vortex matter exhibits important, even dominant, history dependent phenomena in magnetic and transport properties, such as memory and hysteresis in magnetisation curves along with irreversibility and aging in I-V characteristics (see [3,4,32,34,35,36,37,38,39,40,41,42,46,48,61,62] and references therein). These phenomena are markedly out of equilibrium effects and, here, we discuss their features as they emerge from the off equilibrium dynamics of vortex matter (see Ref.s in [1,6,7,8,9]).…”

Section: Introductionmentioning

confidence: 99%

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Ageing and memory phenomena in magnetic and transport properties of vortex matter

Nicodemi¹

2001

J. Phys. A: Math. Gen.

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There is mounting experimental evidence that strong off-equilibrium phenomena, such as "memory" or "aging" effects, play a crucial role in the physics of vortices in type II superconductors. In the framework of a recently introduced schematic vortex model, we describe the out of equilibrium properties of vortex matter. We develop a unified description of "memory" phenomena in magnetic and transport properties, such as magnetisation loops and their "anomalous" 2nd peak, logarithmic creep, "anomalous" finite creep rate for T → 0, "memory" and "irreversibility" of I-V characteristics, time dependent critical currents, "rejuvenation" and "aging" of the system response.

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Section: Magnetisation Loopssupporting

confidence: 92%

Section: Vortex Mean Square Displacementmentioning

confidence: 52%

Section: Magnetisation Loopsmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

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Ageing and memory phenomena in magnetic and transport properties of vortex matter

Nicodemi¹

2001

J. Phys. A: Math. Gen.

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“…Metastability (if any) related to the hindrance of domain motions in a ferromagnet is known to be more while warming up from the low temperature ZFC state than while cooling down from the high temperature region in the presence of an applied field [24]. This lack of "end point memory" is now accepted as a signature of metastability associated with a first order transition [22,23], which is taken as a support for establishing the first order nature of certain vortex matter phase transitions in type-II superconductors [22,23,25]. In this paper we have looked at the AFM state of SmMn 2 Ge 2 which can be reached from both high and low temperature FM state through magnetic phase transitions.…”

mentioning

confidence: 99%

Interesting thermomagnetic history effects in the antiferromagnetic state of SmMn₂Ge₂

Roy

Chaudhary

Chattopadhyay

et al. 2002

J. Phys.: Condens. Matter

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We present results of magnetization measurements showing that the magnetic response of the antiferromagnetic state of SmMn 2 Ge 2 depends on the path used in the field(H)-temperature(T) phase space to reach this state. Distinct signature of metastablity is observed in this antiferromagnetic state when obtained via field-cooling/field-warming paths. The isothermal M-H loops show lack of end-point memory, reminiscent of that seen in metastable vortex states near the field-induced first order phase transition in various type-II superconductors. Typeset using REVT E X 1The intermetallic compound SmMn 2 Ge 2 with its interesting magnetic properties has been a subject of intensive study during last two decades [1][2][3][4][5][6][7][8][9][10]. In low applied magnetic fields it shows at least three magnetic transitions as a function of temperature [1][2][3]6,7].First it undergoes a paramagnetic (PM) to ferromagnetic (FM1) transition at around 350K, followed by an FM1 to antiferromagnetic (AFM) transition at around 160 K (T N 1 ). On reduction of the temperature further this AFM state transforms again into another ferromagnetic (FM2) state around 100 K(T N 2 ). There is a large spread in the reported values of the transition temperatures from FM1 to AFM and AFM to FM2 states. Quality of the samples may be a possible source for the reported differences in the transition temperatures, especially when it is known that the microscopic magnetic properties of RE(rareearth)1-2-2 compomuds are quite sensitive to their underlying crystal lattice structure. On the other hand, there exist now enough evidences from various studies that both of these transitions are probably first order in nature [2,4,11,12]. The first order nature of these magnetic phase transitions can also provide a natural explanation to the reported spread in the transition temperatures. Supercooling(superheating) can take place down(up) to a temperature T * (T * * ) while cooling (heating) across a first order transition point (T N ) [13]. The extent of supercooled/superheated phases will depend on the path followed in the field(H)-temperature(T) phase space [14]. In addition in the samples with defect structures the lower(higher) temperature phase will start nucleating around these defect structures once the sample is cooled(heated) across T N . This nucleation of the lower(higher) T phase will be completed at T * (T * * ), and in the temperature regime T N -T * (T * * -T N ) there will be co-existence of two phases. All these properties will give rise to thermal hysteresis, and such thermal hysteresis is actually observed across the FM2-AFM and AFM-FM1 phase transitions in SmMn 2 Ge 2 [2,4,7].Confined between two FM phase at low and high temperature and reached via first order phase transitions, the AFM phase in SmMn 2 Ge 2 is something special. In this paper, based on our careful dc magnetization studies we shall show that the magnetic response of this AFM state actually depends on the path used in the (H,T) phase space to reach 2 this state. Distinc...

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Magneto-Optical Investigation of the Vortex Order-Disorder Phase Transition in BSCCO

Kalisky

Shaulov

Tamegai

et al. 2004

Magneto-Optical Imaging

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Metastable vortex states inYBa2Cu3O7−

Cited by 42 publications

References 27 publications

Ageing and memory phenomena in magnetic and transport properties of vortex matter

Ageing and memory phenomena in magnetic and transport properties of vortex matter

Interesting thermomagnetic history effects in the antiferromagnetic state of SmMn₂Ge₂

Magneto-Optical Investigation of the Vortex Order-Disorder Phase Transition in BSCCO

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Metastable vortex states inYBa2Cu3O7−

Cited by 42 publications

References 27 publications

Ageing and memory phenomena in magnetic and transport properties of vortex matter

Ageing and memory phenomena in magnetic and transport properties of vortex matter

Interesting thermomagnetic history effects in the antiferromagnetic state of SmMn2Ge2

Magneto-Optical Investigation of the Vortex Order-Disorder Phase Transition in BSCCO

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Product

Resources

About

Interesting thermomagnetic history effects in the antiferromagnetic state of SmMn₂Ge₂