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Magnetization process in honeycomb lattice 蜂窝晶格的磁化过程
Scripta Metallurgica et Materialia Pub Date : 1995-12-01 DOI: 10.1016/0956-716X(95)00428-X
H.Ş. Darendelioǧlu
{"title":"Magnetization process in honeycomb lattice","authors":"H.Ş. Darendelioǧlu","doi":"10.1016/0956-716X(95)00428-X","DOIUrl":"10.1016/0956-716X(95)00428-X","url":null,"abstract":"<div><p>We have studied the possible spin modes in the 2D-honeycomb lattice using the two sub-lattices model.The stabilities of the modes obtained have been expressed in the form of inequalities in terms of exchange integrals. We have also obtained the propagation vectors suitable for the magnetizations which are compatible with the lattice structure. We have emphasized its properties in relation with 2D-hexagonal lattice.</p></div>","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 10","pages":"Pages 1825-1829"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00428-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73573725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Soft magnetic properties of Fe-B prepared by mechanical alloying 机械合金化制备Fe-B的软磁性能
Scripta Metallurgica et Materialia Pub Date : 1995-12-01 DOI: 10.1016/0956-716X(95)00415-R
L. Giri, Anit K. Giri, J.M. González
{"title":"Soft magnetic properties of Fe-B prepared by mechanical alloying","authors":"L. Giri,&nbsp;Anit K. Giri,&nbsp;J.M. González","doi":"10.1016/0956-716X(95)00415-R","DOIUrl":"10.1016/0956-716X(95)00415-R","url":null,"abstract":"<div><p>Fe<sub>100 − x</sub>B<sub>x</sub> (with x = 20, 25 and 50) samples were prepared by high energy ball milling. The phase distribution, thermal stability, saturation magnetization and coercive force of these samples were examined by means of X-ray diffraction, differential scanning calorimetry and vibrating sample and extraction magnetometries, respectively. An excellent soft magnetic behavior, characterized by coercive forces of the order of 2.5 × 10<sup>−5</sup> T, was detected in the case of the Fe<sub>50</sub>B<sub>50</sub> samples milled during times from 150 up to 200 hours. This soft magnetic behavior was correlated to the presence of an amorphous phase in the as-milled sample with composition close to the nominal one.</p></div>","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 10","pages":"Pages 1725-1730"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00415-R","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80319716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Structural design of CoCrPt(Ta,B)/Cr magnetic thin film media for ultra high density longitudinal magnetic recording 超高密度纵向磁记录用CoCrPt(Ta,B)/Cr磁性薄膜介质结构设计
Scripta Metallurgica et Materialia Pub Date : 1995-12-01 DOI: 10.1016/0956-716X(95)00402-H
Pawel Glijer, Kyusik Sin, John M. Sivertsen, Jack H. Judy
{"title":"Structural design of CoCrPt(Ta,B)/Cr magnetic thin film media for ultra high density longitudinal magnetic recording","authors":"Pawel Glijer,&nbsp;Kyusik Sin,&nbsp;John M. Sivertsen,&nbsp;Jack H. Judy","doi":"10.1016/0956-716X(95)00402-H","DOIUrl":"10.1016/0956-716X(95)00402-H","url":null,"abstract":"<div><p>CoCrPt(Ta,B) thin films with Cr underlayers were studied as potential candidates for ultra-high density magnetic recording media for data storage at 10 Gbits/inch<sup>2</sup>. The experimental approach used was aimed at an analysis of the structure-properties relationships in these thin films. As a result structural and composition changes resulting in magnetic and noise properties have been identified. It has been shown that very high in-plane coercivities of 2700 Oe and above could be obtained in CoCrPt films with Pt contents &lt; 20 at.%; in CoCrPtTa for Pt contents &lt; 12% Pt (with 2.5–5% Ta) and in CoCrPtB (with 3–7% B) for Pt contents &lt; 11%. Also methods for improvement of S<sup>∗</sup>, noise characteristics and refinement of grain size and surface roughness have been demonstrated.</p></div>","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 10","pages":"Pages 1575-1584"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00402-H","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83729720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Compositional separation in Co-Cr based thin film magnetic recording media Co-Cr基薄膜磁记录介质中的组分分离
Scripta Metallurgica et Materialia Pub Date : 1995-12-01 DOI: 10.1016/0956-716X(95)00398-F
David J. Rogers, Yasushi Maeda, Koji Takei
{"title":"Compositional separation in Co-Cr based thin film magnetic recording media","authors":"David J. Rogers,&nbsp;Yasushi Maeda,&nbsp;Koji Takei","doi":"10.1016/0956-716X(95)00398-F","DOIUrl":"10.1016/0956-716X(95)00398-F","url":null,"abstract":"<div><p>Since Co is ferromagnetic and Cr is not, compositional inhomogeneities are believed to play an important role in determining the magnetic and recording properties of Co-Cr based thin film magnetic recording media. By preferentially etching Co-enriched regions in a Co-Cr film we discovered a “Chrysanthemum-like Pattern”, suggesting the presence of very fine, periodic compositional variations within individual grains. Subsequent studies, including thermo-magnetic analysis, nuclear magnetic resonance and atom probe field ion microscopy revealed the existence of a Compositional Separation (CS) in these films, producing distinct Co-enriched and Cr-enriched compositional phases. More recently, neutron scattering experiments have provided evidence of a magnetic microstructure with features matching the scale of the Co-enriched regions. Further investigations of this phenomenon are expected to open up new areas of research in both magnetic recording and thin film metallurgy. We review our study of CS, explain control of the compositional distribution using film growth parameters and discuss possible origins of CS.</p></div>","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 10","pages":"Pages 1553-1561"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00398-F","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84079925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Magnetic properties of carbon-coated Sm-Co-C and Mn-Al-C alloy nanoparticles 碳包覆Sm-Co-C和Mn-Al-C合金纳米颗粒的磁性能
Scripta Metallurgica et Materialia Pub Date : 1995-12-01 DOI: 10.1016/0956-716X(95)00411-N
S. Kirkpatrick, M.E. McHenry, M. DeGraef, P.A. Smith, Y. Nakamura, D.E. Laughlin, E.M. Brunsman, J.H. Scott, S.A. Majetich
{"title":"Magnetic properties of carbon-coated Sm-Co-C and Mn-Al-C alloy nanoparticles","authors":"S. Kirkpatrick,&nbsp;M.E. McHenry,&nbsp;M. DeGraef,&nbsp;P.A. Smith,&nbsp;Y. Nakamura,&nbsp;D.E. Laughlin,&nbsp;E.M. Brunsman,&nbsp;J.H. Scott,&nbsp;S.A. Majetich","doi":"10.1016/0956-716X(95)00411-N","DOIUrl":"10.1016/0956-716X(95)00411-N","url":null,"abstract":"","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 10","pages":"Pages 1703-1708"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00411-N","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75292212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
The effect of applied loads on the magnetostrictive response of a Terfenol-D-type material: A micromagnetic analysis 外加载荷对terfenol - d型材料磁致伸缩响应的影响:微磁分析
Scripta Metallurgica et Materialia Pub Date : 1995-12-01 DOI: 10.1016/0956-716X(95)00457-7
Antonio DeSimone
{"title":"The effect of applied loads on the magnetostrictive response of a Terfenol-D-type material: A micromagnetic analysis","authors":"Antonio DeSimone","doi":"10.1016/0956-716X(95)00457-7","DOIUrl":"10.1016/0956-716X(95)00457-7","url":null,"abstract":"","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 10","pages":"Pages 1869-1875"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00457-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74307738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Magnetic hardening and coercivity mechanisms in L10 ordered FePd ferromagnets L10有序FePd铁磁体的磁硬化和矫顽力机制
Scripta Metallurgica et Materialia Pub Date : 1995-12-01 DOI: 10.1016/0956-716X(95)00413-P
T. Klemmer, D. Hoydick, H. Okumura, B. Zhang, W.A. Soffa
{"title":"Magnetic hardening and coercivity mechanisms in L10 ordered FePd ferromagnets","authors":"T. Klemmer,&nbsp;D. Hoydick,&nbsp;H. Okumura,&nbsp;B. Zhang,&nbsp;W.A. Soffa","doi":"10.1016/0956-716X(95)00413-P","DOIUrl":"10.1016/0956-716X(95)00413-P","url":null,"abstract":"<div><p>The tetragonal L1<sub>0</sub> family of ferromagnets including the Co-Pt, Fe-Pt, Fe-Pd and Mn-Al alloy systems exhibits high, uniaxial magnetocrystalline anisotropies with first anisotropy constants K<sub>1</sub> ~ 10<sup>7</sup>–10<sup>8</sup> ergs/cm<sup>3</sup>. The domain parameters of these materials are similar to the rare earth permanent magnets and the defect structure is dominated by planar faults such as APB's, stacking faults, and twins. In this study the micromagnetic analysis of Kronmüller has been applied to elucidate the mechanism of coercivity controlling the hysteresis of the polytwinned L1<sub>0</sub> FePd equiatomic alloy and the results are consistent with pinning control involving atomically thick, planar defects. Also, Lorentz microscopy has been used to observe the interaction of magnetic domain walls with the planar faults characteristic of these materials. Finally, a thermomechanical treatment involving concomitant ordering and recrystallization is shown to eliminate the well-known polytwinned structures which generally evolve during the formation of the L1<sub>0</sub> phase leading to enhanced coercivities. The fundamental structure-property relationships involved are discussed.</p></div>","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 10","pages":"Pages 1793-1805"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00413-P","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74318864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 338
Nanolithographically defined magnetic structures 纳米光刻定义的磁性结构
Scripta Metallurgica et Materialia Pub Date : 1995-12-01 DOI: 10.1016/0956-716X(95)00396-D
Stephen Y. Chou, Peter R. Krauss, Mark S. Wei, Paul B. Fischer
{"title":"Nanolithographically defined magnetic structures","authors":"Stephen Y. Chou,&nbsp;Peter R. Krauss,&nbsp;Mark S. Wei,&nbsp;Paul B. Fischer","doi":"10.1016/0956-716X(95)00396-D","DOIUrl":"10.1016/0956-716X(95)00396-D","url":null,"abstract":"","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 10","pages":"Pages 1537-1544"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00396-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91104235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Correlation of structural defects and magnetic properties in CoCrPt/Cr and CoCrTaPt/Cr thin films for ultra high density magnetic recording media 超高密度磁记录介质用CoCrPt/Cr和CoCrPt/Cr薄膜结构缺陷与磁性能的相关性
Scripta Metallurgica et Materialia Pub Date : 1995-12-01 DOI: 10.1016/0956-716X(95)00403-I
Pawel Glijer , Kyusik Sin , John M. Sivertsen , Jack H. Judy
{"title":"Correlation of structural defects and magnetic properties in CoCrPt/Cr and CoCrTaPt/Cr thin films for ultra high density magnetic recording media","authors":"Pawel Glijer ,&nbsp;Kyusik Sin ,&nbsp;John M. Sivertsen ,&nbsp;Jack H. Judy","doi":"10.1016/0956-716X(95)00403-I","DOIUrl":"10.1016/0956-716X(95)00403-I","url":null,"abstract":"<div><p>Microstructures of high and low coercivity CoCrPt/Cr and CoCrPtTa/Cr were examined. High-coercivity samples were deposited either at high temperatures or with high substrate bias. Low-coercivity samples were deposited at room temperature and at low substrate bias. It was demonstrated that high coercivity films had significantly increased amount of planar faults compared to low-coercivity samples. The faults were identified as densely spaced stacking faults which apparently resulted from the film deformation either during or just after film deposition and they might contribute to higher coercivity due to local changes in crystal anisotropy. An increase in the amount of structural defects by either thermal or impact stress was associated in low-coercivity CoCrPt/Cr films with a profound change of magnetic properties.</p></div>","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 10","pages":"Pages 1585-1592"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00403-I","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91478553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Interlayer magnetic coupling in epitaxial Fe/Cr(211) and (100) superlattices 外延Fe/Cr(211)和(100)超晶格的层间磁耦合
Scripta Metallurgica et Materialia Pub Date : 1995-12-01 DOI: 10.1016/0956-716X(95)00417-T
Eric E. Fullerton, J.E. Mattson, C.H. Sowers, S.D. Bader
{"title":"Interlayer magnetic coupling in epitaxial Fe/Cr(211) and (100) superlattices","authors":"Eric E. Fullerton,&nbsp;J.E. Mattson,&nbsp;C.H. Sowers,&nbsp;S.D. Bader","doi":"10.1016/0956-716X(95)00417-T","DOIUrl":"10.1016/0956-716X(95)00417-T","url":null,"abstract":"<div><p>We present magnetic characterization of epitaxial Fe/Cr(211) and Fe/Cr(100) superlattices grown simultaneously on MgO(110) and (100) substrates, respectively. At room temperature, the coupling for these two orientations oscillates in sign with the same period (18Å), phase and strength. These results indicate that the long-period oscillation is independent of the nested feature of the Cr Fermi-surface. We examine the temperature dependence of interlayer coupling and find a uniform AF bias develops in the (211) samples upon cooling and observe strongly temperature-dependent biquadratic coupling in the (100) samples.</p></div>","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 10","pages":"Pages 1637-1642"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00417-T","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73998859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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