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Activation volume and coercivity in aluminum-substituted Pb–M hexaferrites
PbFe 12− x Al x O 19 samples were obtained by the chemical coprecipitation method with compositions x=0.0, 3.0, 4.0, 6.0. As was expected, significant differences in magnetization reversal mechanisms were found at room temperature in these specimens. A magnetic viscosity study was carried out in the...
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| Published in: | Journal of magnetism and magnetic materials 2000-12, Vol.222 (3), p.271-276 |
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| Main Authors: | , , |
| Format: | Article |
| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-c366t-4f13dc215491b6136c6dd748a8d6c8664737e38e65609467bb0fd6a7401af27c3 |
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| cites | cdi_FETCH-LOGICAL-c366t-4f13dc215491b6136c6dd748a8d6c8664737e38e65609467bb0fd6a7401af27c3 |
| container_end_page | 276 |
| container_issue | 3 |
| container_start_page | 271 |
| container_title | Journal of magnetism and magnetic materials |
| container_volume | 222 |
| creator | Faloh Gandarilla, J.C Dı́az-Castañón, S Suárez Almodovar, N |
| description | PbFe
12−
x
Al
x
O
19 samples were obtained by the chemical coprecipitation method with compositions
x=0.0,
3.0,
4.0,
6.0. As was expected, significant differences in magnetization reversal mechanisms were found at room temperature in these specimens. A magnetic viscosity study was carried out in the temperature range of 75–300
K in order to obtain information related to the mechanism of magnetization behavior. A logarithmic time dependence of the magnetization was observed during a period of 20–1200
s. The magnetic viscosity
S
v and the activation volume
V
a increase as temperature is increased; the samples
x=3.0 and 4.0 show the most rapid increase of the activation volume with temperature. Except for the samples
x=3.0 and 4.0, the experimental temperature dependencies of the coercive field are in agreement with a model due to Givord and co-workers in which the magnetization reversal occurs in a volume equal to the activation volume. |
| doi_str_mv | 10.1016/S0304-8853(00)00431-5 |
| format | article |
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12−
x
Al
x
O
19 samples were obtained by the chemical coprecipitation method with compositions
x=0.0,
3.0,
4.0,
6.0. As was expected, significant differences in magnetization reversal mechanisms were found at room temperature in these specimens. A magnetic viscosity study was carried out in the temperature range of 75–300
K in order to obtain information related to the mechanism of magnetization behavior. A logarithmic time dependence of the magnetization was observed during a period of 20–1200
s. The magnetic viscosity
S
v and the activation volume
V
a increase as temperature is increased; the samples
x=3.0 and 4.0 show the most rapid increase of the activation volume with temperature. Except for the samples
x=3.0 and 4.0, the experimental temperature dependencies of the coercive field are in agreement with a model due to Givord and co-workers in which the magnetization reversal occurs in a volume equal to the activation volume.</description><identifier>ISSN: 0304-8853</identifier><identifier>DOI: 10.1016/S0304-8853(00)00431-5</identifier><identifier>CODEN: JMMMDC</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Activation volume ; Aluminum substitution effects ; Coercivity mechanisms ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Domain effects, magnetization curves, and hysteresis ; Exact sciences and technology ; Ferrimagnetics ; Hexaferrites ; Magnetic aftereffects ; Magnetic properties and materials ; Magnetic viscosity ; Physics ; Studies of specific magnetic materials</subject><ispartof>Journal of magnetism and magnetic materials, 2000-12, Vol.222 (3), p.271-276</ispartof><rights>2000 Elsevier Science B.V.</rights><rights>2001 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c366t-4f13dc215491b6136c6dd748a8d6c8664737e38e65609467bb0fd6a7401af27c3</citedby><cites>FETCH-LOGICAL-c366t-4f13dc215491b6136c6dd748a8d6c8664737e38e65609467bb0fd6a7401af27c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=822606$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Faloh Gandarilla, J.C</creatorcontrib><creatorcontrib>Dı́az-Castañón, S</creatorcontrib><creatorcontrib>Suárez Almodovar, N</creatorcontrib><title>Activation volume and coercivity in aluminum-substituted Pb–M hexaferrites</title><title>Journal of magnetism and magnetic materials</title><description>PbFe
12−
x
Al
x
O
19 samples were obtained by the chemical coprecipitation method with compositions
x=0.0,
3.0,
4.0,
6.0. As was expected, significant differences in magnetization reversal mechanisms were found at room temperature in these specimens. A magnetic viscosity study was carried out in the temperature range of 75–300
K in order to obtain information related to the mechanism of magnetization behavior. A logarithmic time dependence of the magnetization was observed during a period of 20–1200
s. The magnetic viscosity
S
v and the activation volume
V
a increase as temperature is increased; the samples
x=3.0 and 4.0 show the most rapid increase of the activation volume with temperature. Except for the samples
x=3.0 and 4.0, the experimental temperature dependencies of the coercive field are in agreement with a model due to Givord and co-workers in which the magnetization reversal occurs in a volume equal to the activation volume.</description><subject>Activation volume</subject><subject>Aluminum substitution effects</subject><subject>Coercivity mechanisms</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Domain effects, magnetization curves, and hysteresis</subject><subject>Exact sciences and technology</subject><subject>Ferrimagnetics</subject><subject>Hexaferrites</subject><subject>Magnetic aftereffects</subject><subject>Magnetic properties and materials</subject><subject>Magnetic viscosity</subject><subject>Physics</subject><subject>Studies of specific magnetic materials</subject><issn>0304-8853</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNqFkE1Lw0AQhnNQsFZ_ghAQRA_R2exmkp6kFL-goqCel83uBFfSpO5uir35H_yH_hLTD3r1NPDyvDPME0UnDC4ZMLx6AQ4iKYqMnwNcAAjOkmwvGuzig-jQ-w8AYKLAQTQd62AXKti2iRdt3c0oVo2JdUtO24UNy9g2sepz23SzxHelDzZ0gUz8XP5-_zzG7_SlKnLOBvJH0X6lak_H2zmM3m5vXif3yfTp7mEyniaaI4ZEVIwbnbJMjFiJjKNGY3JRqMKgLhBFznPiBWGGMBKYlyVUBlUugKkqzTUfRmebvXPXfnbkg5xZr6muVUNt52XKc8ART3sw24Datd47quTc2ZlyS8lArnzJtS-5EiMB5NqXzPre6faA8lrVlVONtn5XLtIUAXvqekNR_-vCkpNeW2o0GetIB2la-8-dPwEygZ8</recordid><startdate>20001201</startdate><enddate>20001201</enddate><creator>Faloh Gandarilla, J.C</creator><creator>Dı́az-Castañón, S</creator><creator>Suárez Almodovar, N</creator><general>Elsevier B.V</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20001201</creationdate><title>Activation volume and coercivity in aluminum-substituted Pb–M hexaferrites</title><author>Faloh Gandarilla, J.C ; Dı́az-Castañón, S ; Suárez Almodovar, N</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c366t-4f13dc215491b6136c6dd748a8d6c8664737e38e65609467bb0fd6a7401af27c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>Activation volume</topic><topic>Aluminum substitution effects</topic><topic>Coercivity mechanisms</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Domain effects, magnetization curves, and hysteresis</topic><topic>Exact sciences and technology</topic><topic>Ferrimagnetics</topic><topic>Hexaferrites</topic><topic>Magnetic aftereffects</topic><topic>Magnetic properties and materials</topic><topic>Magnetic viscosity</topic><topic>Physics</topic><topic>Studies of specific magnetic materials</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Faloh Gandarilla, J.C</creatorcontrib><creatorcontrib>Dı́az-Castañón, S</creatorcontrib><creatorcontrib>Suárez Almodovar, N</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of magnetism and magnetic materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Faloh Gandarilla, J.C</au><au>Dı́az-Castañón, S</au><au>Suárez Almodovar, N</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Activation volume and coercivity in aluminum-substituted Pb–M hexaferrites</atitle><jtitle>Journal of magnetism and magnetic materials</jtitle><date>2000-12-01</date><risdate>2000</risdate><volume>222</volume><issue>3</issue><spage>271</spage><epage>276</epage><pages>271-276</pages><issn>0304-8853</issn><coden>JMMMDC</coden><abstract>PbFe
12−
x
Al
x
O
19 samples were obtained by the chemical coprecipitation method with compositions
x=0.0,
3.0,
4.0,
6.0. As was expected, significant differences in magnetization reversal mechanisms were found at room temperature in these specimens. A magnetic viscosity study was carried out in the temperature range of 75–300
K in order to obtain information related to the mechanism of magnetization behavior. A logarithmic time dependence of the magnetization was observed during a period of 20–1200
s. The magnetic viscosity
S
v and the activation volume
V
a increase as temperature is increased; the samples
x=3.0 and 4.0 show the most rapid increase of the activation volume with temperature. Except for the samples
x=3.0 and 4.0, the experimental temperature dependencies of the coercive field are in agreement with a model due to Givord and co-workers in which the magnetization reversal occurs in a volume equal to the activation volume.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/S0304-8853(00)00431-5</doi><tpages>6</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0304-8853 |
| ispartof | Journal of magnetism and magnetic materials, 2000-12, Vol.222 (3), p.271-276 |
| issn | 0304-8853 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_23706932 |
| source | ScienceDirect Journals |
| subjects | Activation volume Aluminum substitution effects Coercivity mechanisms Condensed matter: electronic structure, electrical, magnetic, and optical properties Domain effects, magnetization curves, and hysteresis Exact sciences and technology Ferrimagnetics Hexaferrites Magnetic aftereffects Magnetic properties and materials Magnetic viscosity Physics Studies of specific magnetic materials |
| title | Activation volume and coercivity in aluminum-substituted Pb–M hexaferrites |
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