Preface

Cardwell, D. A.; Murakami, Masato; Saláma, K.

doi:10.1016/s0921-5107(97)00291-2

Cited by 40 publications

(59 citation statements)

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“…The size of defects in the bulk superconducting matrix, which are responsible for flux pinning, should be typically twice the size of the coherence length (a few nano-meters in YBCO) to optimize the flux pinning force. To date the defect density in melt processed (RE)-Ba-Cu-O bulk superconductors has been engineered partially by refining the size of RE 2 BaCuO 5 (RE-211) second phase inclusions in the bulk matrix and by increasing their density [1,2]. RE-211 particles, however, tend to ripen during the REBa 2 Cu 3 O 7-δ (RE-123) peritectic solidification process [3], and, as a result, refining the size of these inclusions on the nano-scale has generally proved unsuccessful.…”

Section: Introductionmentioning

confidence: 99%

Nano-composite single grain YBa₂Cu₃O_7-δ/Y₂Ba₄CuBiO_ybulk superconductors

Babu

Liu

Iida

et al. 2006

J. Phys.: Conf. Ser.

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Section: Introductionmentioning

confidence: 99%

Nano-composite single grain YBa₂Cu₃O_7-δ/Y₂Ba₄CuBiO_ybulk superconductors

Babu

Liu

Iida

et al. 2006

J. Phys.: Conf. Ser.

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“…The good coincidence of this back curve with the fitted curve on the whole range gives the proof of feasibility of Eq. (15) instead of (14). …”

Section: 1mentioning

confidence: 99%

“…Moreover, after the development of the melt-textured (MT) technology (see [14] and references therein) of HTS bulks processing, a real interest in the levitation systems for so-called largescale (LS) applications [15,16] has appeared. The LS systems like flywheels for energy storage, electric motors and generators, permanent magnets, etc.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Flux Dynamics in HTS Bulks with Levitation Techniques

et al. 2002

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The discovery of high-temperature superconductors (HTS) has led to understanding that, in order to explain and utilize the phenomenon, completely new physical approaches should be introduced at all scales: microscopic, mesoscopic, macroscopic. Leaving first two scales beyond the scope of the present paper, we focus in the upper limit of the last scale, the study of the magnetic flux dynamics in HTS bulks-the dynamics of the 'compact vortex structures'. A new direction in the experimental superconducting physics, the investigation of HTS bulks with levitation techniques, which has been elaborated during last years to effectively explore the subject, as well as the new fundamental and applied results obtained there from are overviewed here.Відкриття високотемпературних надпровідників (ВТНП) призвело до розуміння то-го, що задля пояснення та використання цього явища на всіх рівнях: мікроскопічно-му, мезоскопічному та макроскопічному, має бути створено принципово нові фізичні підходи. Полишаючи перші два рівні поза увагою даної роботи, ми детально розгля-даємо верхню границю останнього -дослідження динаміки магнітного потоку в масивних ВТНП, динаміки «компактових вихорових структур». Дана робота -це огляд нового напрямку експериментальної фізики надпровідників -дослідження масивних ВТНП левітаційними методами -що його було вироблено останнім часом для вивчення зазначеної проблеми, а також тих нових фундаментальних та практич-них результатів, що було тут отримано.Открытие высокотемпературных сверхпроводников (ВТСП) привело к пониманию того, что для объяснения и использования этого явления необходимо создание принципиально новых физических подходов на всех уровнях: микроскопическом, мезоскопическом, макроскопическом. Оставляя первые два уровня за рамками данной работы, мы сфокусировали внимание на верхнем пределе последнего -исследовании динамики магнитного потока в массивных ВТСП, динамики «ком-пактных вихревых структур». Данная работа -это обзор нового направления экс-периментальной физики сверхпроводников, которое было выработано за послед- Fiz. Met. 2002, т. 3, сс. 357-386 Оттиски доступны непосредственно от издателя Фотокопирование разрешено только в соответствии с лицензией 2002 ИМФ (Институт металлофизики им. Г. В. Курдюмова НАН Украины) Напечатано в Украине. 358A. A. Kordyuk, V. V. Nemoshkalenko , A. I. Plyushchay, and R. V. Viznichenko ние годы, а также тех новых фундаментальных и прикладных результатов, которые были здесь получены.

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“…Typically the seed is placed on the top of the sample, promoting epitaxial growth of Y-123 at the Nd-123 -Liquid+Y 2 BaCuO 5 (Y-211) interface [8]. Moreover, a thermal gradient can be applied in order to improve the domain growth.…”

mentioning

confidence: 99%

“…Numerous studies on YBCO bulk materials focus on the optimisation of their microstructure and electrical properties [5,8,10,13,[15][16][17][18], but little is known about the mechanical properties of these materials.…”

mentioning

confidence: 99%

The contribution of 211 particles to the mechanical reinforcement mechanism of 123 superconducting single domains

Mathieu

Cano

Koutzarova

et al. 2003

Supercond. Sci. Technol.

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Hardness and fracture toughness of Dy-123 single-domains were studied by Vickers microindentation. A significant anisotropy of the mechanical properties was observed. Hardness tests give higher values when performed in (001) planes rather than in planes parallel to the caxis. Moreover cracks pattern around the indentation follows preferential orientation in planes parallel to the c-axis whereas a classical four-cracks pattern is observed in the (001) planes.It has been possible to show the crucial role played by the 211-particles in the deviating mechanism of cracks and the relevance of the 211-particle distribution high homogeneity in the material.

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Preface

Cited by 40 publications

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Nano-composite single grain YBa₂Cu₃O_7-δ/Y₂Ba₄CuBiO_ybulk superconductors

Nano-composite single grain YBa₂Cu₃O_7-δ/Y₂Ba₄CuBiO_ybulk superconductors

Magnetic Flux Dynamics in HTS Bulks with Levitation Techniques

The contribution of 211 particles to the mechanical reinforcement mechanism of 123 superconducting single domains

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Preface

Cited by 40 publications

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Nano-composite single grain YBa2Cu3O7-δ/Y2Ba4CuBiOybulk superconductors

Nano-composite single grain YBa2Cu3O7-δ/Y2Ba4CuBiOybulk superconductors

Magnetic Flux Dynamics in HTS Bulks with Levitation Techniques

The contribution of 211 particles to the mechanical reinforcement mechanism of 123 superconducting single domains

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Product

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Nano-composite single grain YBa₂Cu₃O_7-δ/Y₂Ba₄CuBiO_ybulk superconductors

Nano-composite single grain YBa₂Cu₃O_7-δ/Y₂Ba₄CuBiO_ybulk superconductors