IEEE International Magnetics Conference最新文献

{"title":"Giant magneto-impedance effects in manganite oxides","authors":"C. Fu, M. Lin, S. Sung, Z.H. Wuen","doi":"10.1109/INTMAG.1999.837977","DOIUrl":"https://doi.org/10.1109/INTMAG.1999.837977","url":null,"abstract":"There has been much interest in the manganese oxides in the phenomena of colossal magneto-resistance (CMR), which remarkable reduction in the dc resistivity of the samples by the application of a dc magnetic field [I] . Analog to the dc magneto-resitive phenomena, recent experimental works show that the magneto-transport behavior at high frequency can be sensitively affected in sofl magnetic Co-FeSi-B amorphous wires and films [2,3]. This effect is considered being based on the classical electromagnetic origin. Although considerable researches were done for complete understanding of the CMR phenomena, there have been a few reports of magneto-transport behavior in the radio frequency region. In this report, we present the study of magneto-transport properties on the sintered La,,sCa,,sMn03 at frequency tium 20 to IMHz. Experimental results have demonstrated that the giant magneto-impedance effects, much larger than the dc magneto resistive effects, on these manganite oxides.","PeriodicalId":425017,"journal":{"name":"IEEE International Magnetics Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133971789","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}

{"title":"D. C. magnetic field measurements based on the inverse Wiedemann effect in Fe-rich glass coverered amorphous wires","authors":"H. Chiriac, E. Hristoforou, M. Neagu, I. Darie, F. Barariu","doi":"10.1109/INTMAG.1999.837362","DOIUrl":"https://doi.org/10.1109/INTMAG.1999.837362","url":null,"abstract":"Results concerning the dependence of the inverse Wiedemann effect (IWE) voltage in Fe/sub 77.5/Si/sub 7.5/B/sub 15/ glass covered amorphous wire on the external DC magnetic field are presented. In the 0.01-0.015 mT and 0.02-0.03 mT ranges for torsion annealed and as-cast wires, respectively, there is a linear dependence of the IWE voltage on the DC magnetic field. The response sensitivity increases up to about 19 V/mT when the AC current frequency increases up to about 3 kHz. DC magnetic field sensing elements, based on the IWE effect, having small dimensions, very good mechanical and corrosion resistance can be realized using glass covered amorphous wires.","PeriodicalId":425017,"journal":{"name":"IEEE International Magnetics Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131955354","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}

{"title":"FEM analysis of thin-film inductors used in GHz frequency bands","authors":"S. Tanabe, Y. Shiraki, K. Ito, M. Yamaguchi, K. Arai","doi":"10.1109/INTMAG.1999.837938","DOIUrl":"https://doi.org/10.1109/INTMAG.1999.837938","url":null,"abstract":"Three dimensional finite element method (3D-FEM) simulations have been used to study the possibility of magnetic film utilization to make GHz frequency band inductors. A simple structure of a flat magnetic film above a spiral coil gained about 65% inductance increase. Granular type soft magnetic films showed the best results.","PeriodicalId":425017,"journal":{"name":"IEEE International Magnetics Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134231776","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}

{"title":"Experimental study of interaction field between the nanostructured Ni columns","authors":"J. Bae, K. Youcef-Toumi","doi":"10.1109/INTMAG.1999.837996","DOIUrl":"https://doi.org/10.1109/INTMAG.1999.837996","url":null,"abstract":"Nanoshuctu~td m y of magnetic pillars has been proposed for a high density data storage medium.[l] At a high recording density, the pillars are likely to be interacting with each other to the extent that it can be fatal to the data storage application. In this work, for the first time, we will provide an experimental way of measuring the interaction field between the pillars at a recording density higher than 16 Gbit\". Sample Preparation The experiments were performed on an array of small size nickel pillars with a period, ranging from 150 nm to 300 nm. In the may, the cylindrical shaped pillars of a diameter down to 90 nm had the aspect ratio of 2. In the fabrication of test media, the electron beam lithography was used to expose a pattern on the resist, PMMA. The PMMA is used as a template for the electroplating of Nickel and later cleaned off with acetone for the magnetic measurements on the resulting structure. lnteraction Field Measurement The pillars were found out to he the single domain and have the easy axis along the out of plane direction. The net interaction field applied to a pillar from the adjacent pillars can be calculated from &,=(H*-H-)n, where H' and K are the switching fields of the pillar in two opposite directions along the vertical axis.[2] To measure Wand H-, the magnetic force microscope with an in situ electromagnet was used. A known field is applied to the target pillar and it is increased by step of 50 Oe till the pillar reverses the magnetization stale. The pillar's magnetic state was 0bsew.d by the MFM pbase detection imaging. In Fig. I , the MFM images show that the pillar in a dotted square reverses its magnetization at a certain applied field. A key factor in the measurement is to keep the neighbor pillars in the same magnetic state while the target pillar's switching field is measured. Point magnetic recording( PMR ) method is used for such purpose.[3] In PMR, the MFM tip comes in contact with the sample at the top center of the pillar and the field is applied from the electromagnet. The field, concentrated near the tip, was Jungmok Bae Subject Category 14 Daewoo Electonics Co., LTD. TMA Module Team 60-8 Kasan-dong, Kumchun-gu Seoul, Kored 153-023 Preference Oral Tel) 02-818-9870 Fax) 02-862-0386 Email) jungmok@tma.dwe.co.kr 0-7803-5555-5/99/$10.00 0 1 9991EEE. HC-07 controlled by the external field from the electromagnet. We were able to flip the pillar at the period as small as 200 nm. The exact field applied to the pillars were found out experimentally and verified by the simulation using commercial Maxwell software. Using the scheme, the interaction field for the period of 200 nm, 25n nm, and 300 nm in various neighboring pillars' states were measured.","PeriodicalId":425017,"journal":{"name":"IEEE International Magnetics Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133855264","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}

{"title":"Domain imaging of magnetic recording media by spin-polarized scanning tunneling microscopy","authors":"H. Kodama, T. Uzumaki, M. Oshiki, K. Sueoka, K. Mukasa","doi":"10.1109/INTMAG.1999.837759","DOIUrl":"https://doi.org/10.1109/INTMAG.1999.837759","url":null,"abstract":"","PeriodicalId":425017,"journal":{"name":"IEEE International Magnetics Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115041512","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}

{"title":"Magnetic properties of CoZrNb thin film deposited on SmCo thin film","authors":"Y.H. Kim, K. Ishiyama, K. Arai","doi":"10.1109/INTMAG.1999.837458","DOIUrl":"https://doi.org/10.1109/INTMAG.1999.837458","url":null,"abstract":"","PeriodicalId":425017,"journal":{"name":"IEEE International Magnetics Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115075226","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}

{"title":"Photothermally modulated ferromagnetic resonce images of magnetic excitations in ferrite films at various temperatures","authors":"M. Kaak, S. Jun, S. Nikitov, J. Pelzl","doi":"10.1109/INTMAG.1999.837753","DOIUrl":"https://doi.org/10.1109/INTMAG.1999.837753","url":null,"abstract":"","PeriodicalId":425017,"journal":{"name":"IEEE International Magnetics Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114340870","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}

{"title":"Deposition of paramagnetic Co/sub 4/Cr/sub 2/ seed layer for ferromagnetic Co/sub 5/Cr/sub 1/ recording layer in 1000 KFCI perpendicular media","authors":"A. Sato, M. Hatakeyama, S. Nakagawa, M. Naoe","doi":"10.1109/INTMAG.1999.837237","DOIUrl":"https://doi.org/10.1109/INTMAG.1999.837237","url":null,"abstract":"In the dcvelopmcnl of high dcnsit) Co-Cr perpendicular magnetic rccording mcdia. i t IS required io use a seed layer. which promotes c-axis orientation and cnhanccs magnetic anisotropy of thc rccording layer. Whcn the Co-Cr ferrumagnctic film is directly dcposiled nn a substrate, its initial growth laycr bccomes amorphous and dues nut form thc wlumnac crystallites Considering two lypcs alloy of Co.Cr, and Co-rich Co,Cr,, ihe hcp latticc wnstant in c-planc of Co,Cr, alluy is large, since the Co.Cr, alloy hac largcr Cr conicnls than CQ,Cr, 111. Thercfore, the hcp Co,Cr, layer is easily dcpositcd on Ihc Co,Cr, cpitaxially. The Co,Cr, laycr posscsses high crystallinity and paramagnetism at roum tempcraturc and docs not affcci to the ferromagnclic layer dcpositcd on it. Even the 10 nm thick Co,Cr, films. rcvcal thc excellent c-axis orientation. On such the layer, high pelpendicular cacrcivity i ubtaincd by depositing thc Co-rich Co,Cr, laycr with thicknus of 100 nm The condition of its aspect ratio 1 0 1 is siiggcstcd as Ihc oplimization factor for the magnetlc charactcristics of Co-rich Co-Cr film with a sccd laycr. In this study, thc Co,Cr, seed laysn wcrc deposited at diffcrcnt substratc tcmperaturcs T, in order to improve thc magnetic charactcristics and thc crystallinity of the Co-rich Co-Cr alloy rcwrding laycr deposited on it. The seed laycr dcpusitcd at T, of 80 -C improved must cffcctively thc magnetic charJcleristics and 11 is expected io contribute to the progress of IOW noise and high dcnsity magnetic recording mcdia.","PeriodicalId":425017,"journal":{"name":"IEEE International Magnetics Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114245860","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}

{"title":"The calculation of output time decay in very-thin film disks","authors":"M. Shinohara, I. Okamoto, K. Sato","doi":"10.1109/INTMAG.1999.837805","DOIUrl":"https://doi.org/10.1109/INTMAG.1999.837805","url":null,"abstract":"Low noise media are , q u i d together with recent MR or Spin-valve heads for high density applications. To decrease the media noise, the magnetic unit, which is a grain or the activation volume in the film, must be shrunk. It is well known that the smaller the magnetic unir, the more susceptible it is to thermal fluctuations. This results in magnetization decay and in the broadening of the magnetic transition length “a” in a recorded medium. Both result in output decay. Under an assumption that magnetization maintains an arctan distribution, we can estimate “a” from the slope of the Mr distribution (and dHx/dx(x=0)) as a function of time 1, energy barrier BE and its distribution, temperature, and the magnetic properties ofthe media. Using the Mr decay data and the Anhenius equation [l], we determined the mean value <AEikT> and its standard deviation a. Therefore, the output decay with time for various recording densities can be estimated. We found fair agreement between calculations and experiments at low recording densities.","PeriodicalId":425017,"journal":{"name":"IEEE International Magnetics Conference","volume":"168-169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114404792","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}

{"title":"Magnetic properties of thin film media with various crystallographic orientations on glass substrates","authors":"G. R. Jones, K. O'Grady, M. Mirzamaani, X. Bian, M. Doerner","doi":"10.1109/INTMAG.1999.837431","DOIUrl":"https://doi.org/10.1109/INTMAG.1999.837431","url":null,"abstract":"This study is concerned with the investigation of thin film media with varying crystallographic orientations of the grains in the magnetic layer. CoCrPtTa films with a CrTi underlayer were deposited on glass substrates. AN, NiAl or Ta seed layers were deposited in order to control the crystal orientation and grain size of the underlayer, and hence the magnetic layer on three ofthe 6lms (samples B, C, and D). The control sample A had no seed layer. The CrTi underlayer was used to control the morphology of the magnetic layer. The detailed crystallographic and recording properties of these flms have been reported previously [I] and are summarised in table.","PeriodicalId":425017,"journal":{"name":"IEEE International Magnetics Conference","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121552674","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}