Hysteresis losses and magnetic phenomena in oscillating disks of type II superconductors
Hysteresis losses and the behavior of the magnetic flux threading superconducting disks of Nb oscillating slowly over various angular displacements in static magnetic fields H0 directed perpendicular to the axis of rotation have been investigated by continuously monitoring 〈Bz〉 and 〈By〉, the average...
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Veröffentlicht in: | J. Appl. Phys.; (United States) 1982-03, Vol.53 (3), p.1631-1648 |
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creator | Cave, J. R. LeBlanc, M. A. R. |
description | Hysteresis losses and the behavior of the magnetic flux threading superconducting disks of Nb oscillating slowly over various angular displacements in static magnetic fields H0 directed perpendicular to the axis of rotation have been investigated by continuously monitoring 〈Bz〉 and 〈By〉, the average components of the magnetic induction, in the plane of the disk, parallel and perpendicular to H0. A simple model proposed previously satisfactorily accounts for the initial changes, starting from various initial flux configurations, the subsequent cyclical behavior, and the hysteresis losses. Expulsion of flux from the disk occurs during part of the first oscillation, then the amount of flux threading the disk remains constant during the subsequent oscillations, although the orientation distribution of the flux profile undergoes spectacular periodic variations. The analysis shows that dψ/dx = ±k dB/dx describes the orientation of the sheets of flux lines with respect to H0 with distance from the flat surfaces. dB/dx is the critical gradient of flux density and k(T) is the shearing parameter of the flux lattice for the sample. The surface step, ignored in the previous work, is introduced in the model using simple approximations. |
doi_str_mv | 10.1063/1.330613 |
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R. ; LeBlanc, M. A. R.</creator><creatorcontrib>Cave, J. R. ; LeBlanc, M. A. R. ; Univ. of Ottawa, Ontario, Canada</creatorcontrib><description>Hysteresis losses and the behavior of the magnetic flux threading superconducting disks of Nb oscillating slowly over various angular displacements in static magnetic fields H0 directed perpendicular to the axis of rotation have been investigated by continuously monitoring 〈Bz〉 and 〈By〉, the average components of the magnetic induction, in the plane of the disk, parallel and perpendicular to H0. A simple model proposed previously satisfactorily accounts for the initial changes, starting from various initial flux configurations, the subsequent cyclical behavior, and the hysteresis losses. Expulsion of flux from the disk occurs during part of the first oscillation, then the amount of flux threading the disk remains constant during the subsequent oscillations, although the orientation distribution of the flux profile undergoes spectacular periodic variations. The analysis shows that dψ/dx = ±k dB/dx describes the orientation of the sheets of flux lines with respect to H0 with distance from the flat surfaces. dB/dx is the critical gradient of flux density and k(T) is the shearing parameter of the flux lattice for the sample. The surface step, ignored in the previous work, is introduced in the model using simple approximations.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.330613</identifier><language>eng</language><publisher>United States</publisher><subject>656102 - Solid State Physics- Superconductivity- Acoustic, Electronic, Magnetic, Optical, & Thermal Phenomena- (-1987) ; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ; CONFIGURATION ; DATA ; ELEMENTS ; ENERGY LOSSES ; FLUX DENSITY ; HYSTERESIS ; INFORMATION ; LOSSES ; MAGNETIC DISKS ; MAGNETIC FIELDS ; MAGNETIC FLUX ; MAGNETIC PROPERTIES ; MAGNETIC STORAGE DEVICES ; MATHEMATICAL MODELS ; MEMORY DEVICES ; METALS ; MONITORING ; NIOBIUM ; NUMERICAL DATA ; OSCILLATIONS ; PHYSICAL PROPERTIES ; REFRACTORY METALS ; SHEAR ; SUPERCONDUCTORS ; TEMPERATURE GRADIENTS ; THEORETICAL DATA ; TRANSITION ELEMENTS ; TYPE-II SUPERCONDUCTORS ; VARIATIONS</subject><ispartof>J. Appl. 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Phys.; (United States)</title><description>Hysteresis losses and the behavior of the magnetic flux threading superconducting disks of Nb oscillating slowly over various angular displacements in static magnetic fields H0 directed perpendicular to the axis of rotation have been investigated by continuously monitoring 〈Bz〉 and 〈By〉, the average components of the magnetic induction, in the plane of the disk, parallel and perpendicular to H0. A simple model proposed previously satisfactorily accounts for the initial changes, starting from various initial flux configurations, the subsequent cyclical behavior, and the hysteresis losses. Expulsion of flux from the disk occurs during part of the first oscillation, then the amount of flux threading the disk remains constant during the subsequent oscillations, although the orientation distribution of the flux profile undergoes spectacular periodic variations. The analysis shows that dψ/dx = ±k dB/dx describes the orientation of the sheets of flux lines with respect to H0 with distance from the flat surfaces. dB/dx is the critical gradient of flux density and k(T) is the shearing parameter of the flux lattice for the sample. The surface step, ignored in the previous work, is introduced in the model using simple approximations.</description><subject>656102 - Solid State Physics- Superconductivity- Acoustic, Electronic, Magnetic, Optical, & Thermal Phenomena- (-1987)</subject><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</subject><subject>CONFIGURATION</subject><subject>DATA</subject><subject>ELEMENTS</subject><subject>ENERGY LOSSES</subject><subject>FLUX DENSITY</subject><subject>HYSTERESIS</subject><subject>INFORMATION</subject><subject>LOSSES</subject><subject>MAGNETIC DISKS</subject><subject>MAGNETIC FIELDS</subject><subject>MAGNETIC FLUX</subject><subject>MAGNETIC PROPERTIES</subject><subject>MAGNETIC STORAGE DEVICES</subject><subject>MATHEMATICAL MODELS</subject><subject>MEMORY DEVICES</subject><subject>METALS</subject><subject>MONITORING</subject><subject>NIOBIUM</subject><subject>NUMERICAL DATA</subject><subject>OSCILLATIONS</subject><subject>PHYSICAL PROPERTIES</subject><subject>REFRACTORY METALS</subject><subject>SHEAR</subject><subject>SUPERCONDUCTORS</subject><subject>TEMPERATURE GRADIENTS</subject><subject>THEORETICAL DATA</subject><subject>TRANSITION ELEMENTS</subject><subject>TYPE-II SUPERCONDUCTORS</subject><subject>VARIATIONS</subject><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1982</creationdate><recordtype>article</recordtype><recordid>eNotkMFKw0AURQdRsFbBTxhciJvUmbwkTZZS1BYKbhTcDa-TN-1oOxPzpov-vZG4upvD5d4jxK1WM60qeNQzAFVpOBMTreomm5elOhcTpXKd1c28uRRXzF9KaV1DMxGfyxMn6ok9y31kJpYYWnnAbaDkrex2FOKBAkofZGTr93tMPmxl6_mbZXQynTqSq5XkY0e9jaE92hR7vhYXDvdMN_85FR8vz--LZbZ-e10tntaZhaJJGTlVukY7hByhqtoStXXYOsJ6Y13tLAIWKkesCwvY6k0FOZWwaYs5lGgtTMXd2Bs5eTMMTGR3w4xANplyXjXQlAN0P0JdH3-OxMkcPFsavgSKRzY5FHleDOxUPIyg7QcZPTnT9f6A_cloZf78Gm1Gv_ALnm5u5Q</recordid><startdate>19820301</startdate><enddate>19820301</enddate><creator>Cave, J. R.</creator><creator>LeBlanc, M. A. R.</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>19820301</creationdate><title>Hysteresis losses and magnetic phenomena in oscillating disks of type II superconductors</title><author>Cave, J. R. ; LeBlanc, M. A. R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c349t-ef05f91fa32a366d5a1cfadfea8bcf8fca3a402aa84c3ad1b632e53bd4735acc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1982</creationdate><topic>656102 - Solid State Physics- Superconductivity- Acoustic, Electronic, Magnetic, Optical, & Thermal Phenomena- (-1987)</topic><topic>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</topic><topic>CONFIGURATION</topic><topic>DATA</topic><topic>ELEMENTS</topic><topic>ENERGY LOSSES</topic><topic>FLUX DENSITY</topic><topic>HYSTERESIS</topic><topic>INFORMATION</topic><topic>LOSSES</topic><topic>MAGNETIC DISKS</topic><topic>MAGNETIC FIELDS</topic><topic>MAGNETIC FLUX</topic><topic>MAGNETIC PROPERTIES</topic><topic>MAGNETIC STORAGE DEVICES</topic><topic>MATHEMATICAL MODELS</topic><topic>MEMORY DEVICES</topic><topic>METALS</topic><topic>MONITORING</topic><topic>NIOBIUM</topic><topic>NUMERICAL DATA</topic><topic>OSCILLATIONS</topic><topic>PHYSICAL PROPERTIES</topic><topic>REFRACTORY METALS</topic><topic>SHEAR</topic><topic>SUPERCONDUCTORS</topic><topic>TEMPERATURE GRADIENTS</topic><topic>THEORETICAL DATA</topic><topic>TRANSITION ELEMENTS</topic><topic>TYPE-II SUPERCONDUCTORS</topic><topic>VARIATIONS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cave, J. R.</creatorcontrib><creatorcontrib>LeBlanc, M. A. R.</creatorcontrib><creatorcontrib>Univ. of Ottawa, Ontario, Canada</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>J. Appl. Phys.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Cave, J. R.</au><au>LeBlanc, M. A. R.</au><aucorp>Univ. of Ottawa, Ontario, Canada</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hysteresis losses and magnetic phenomena in oscillating disks of type II superconductors</atitle><jtitle>J. Appl. Phys.; (United States)</jtitle><date>1982-03-01</date><risdate>1982</risdate><volume>53</volume><issue>3</issue><spage>1631</spage><epage>1648</epage><pages>1631-1648</pages><issn>0021-8979</issn><eissn>1089-7550</eissn><abstract>Hysteresis losses and the behavior of the magnetic flux threading superconducting disks of Nb oscillating slowly over various angular displacements in static magnetic fields H0 directed perpendicular to the axis of rotation have been investigated by continuously monitoring 〈Bz〉 and 〈By〉, the average components of the magnetic induction, in the plane of the disk, parallel and perpendicular to H0. A simple model proposed previously satisfactorily accounts for the initial changes, starting from various initial flux configurations, the subsequent cyclical behavior, and the hysteresis losses. Expulsion of flux from the disk occurs during part of the first oscillation, then the amount of flux threading the disk remains constant during the subsequent oscillations, although the orientation distribution of the flux profile undergoes spectacular periodic variations. The analysis shows that dψ/dx = ±k dB/dx describes the orientation of the sheets of flux lines with respect to H0 with distance from the flat surfaces. dB/dx is the critical gradient of flux density and k(T) is the shearing parameter of the flux lattice for the sample. The surface step, ignored in the previous work, is introduced in the model using simple approximations.</abstract><cop>United States</cop><doi>10.1063/1.330613</doi><tpages>18</tpages></addata></record> |
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subjects | 656102 - Solid State Physics- Superconductivity- Acoustic, Electronic, Magnetic, Optical, & Thermal Phenomena- (-1987) CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY CONFIGURATION DATA ELEMENTS ENERGY LOSSES FLUX DENSITY HYSTERESIS INFORMATION LOSSES MAGNETIC DISKS MAGNETIC FIELDS MAGNETIC FLUX MAGNETIC PROPERTIES MAGNETIC STORAGE DEVICES MATHEMATICAL MODELS MEMORY DEVICES METALS MONITORING NIOBIUM NUMERICAL DATA OSCILLATIONS PHYSICAL PROPERTIES REFRACTORY METALS SHEAR SUPERCONDUCTORS TEMPERATURE GRADIENTS THEORETICAL DATA TRANSITION ELEMENTS TYPE-II SUPERCONDUCTORS VARIATIONS |
title | Hysteresis losses and magnetic phenomena in oscillating disks of type II superconductors |
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