简介:ThemeasurementsoftemperaturedependenceofthemagneticsusceptibilityofLa1-xSrxCoO3perovskiteoxidesatdifferentSrdoping(0≤x≤0.5)andannealingtemperaturewerepresented.Forthesamplewithx=0.1,ashoulderwasobservedaround150K,andapeakwhichisonefeatureofspinglassappearedaround50Kinthecurveofsusceptibilityversustemperature.Thehigh-temperature(250~420K)susceptibilityfitswellwithCurie-Weisslawforallsamples.WeissconstantandeffectivemagneticmomentweredeterminedandtheirvariationswithSrdopingandoxygenannealingconditionwereobtained.TheWeissconstantincreasesmonotonouslywithSrcontentforx>0.2.Thevaluesofeffectivemomentswereinterpretedwiththespinstateofcobaltions.Studiesonthesusceptibilitiesofthesampleswithx=0.2underdifferentpreparationtemperaturesandannealingtemperaturesshowthattherisingofsinteringtemperatureandannealingtemperaturewillincreasethepara-ferromagnetictransitiontemperature,andreducetheeffectivemomenttonormalvalue.OurresultshowsthatbothCo3+andCo4+ionsshouldbeinISstateafterannealingandtheoxygenannealingcausesthetransitionofCo3+spinstatefromHStoIS.
简介:Thereisagrowingsupportforthelowlyingscalarmesonsf0(500),f0(980),a0(980),and(800)tobegenerateddynamicallyfromtheinteractionofpseudoscalarmesons,whilethecaseofthenextsetofscalarresonancesathigherenergies,f0(1370),f0(1710),K0(1430)ismoreaquestionofdebate.Soisthecaseofthetensorresonancesf2(1270),f′2(1525),K2(1430).AnewperspectiveonthesestateshasbeenofferedinRef.[1]wherethef0(1370)andf2(1270)resonancesareshowntobegeneratedfromtheinteractionprovidedbythelocalhiddengaugeLagrangiansimplementingunitarization.Itisshownthattheideaofthenatureofthesestatesasvectormeson-vectormesoncompositestateshasbeentestedinmanyreactions.Yet,thepermanentdiscussionoftheissuedemandsextrachecksforotherobservablesand,inthissense,theweakdecaysbringanewsourceofvaluableinformationthatshouldservetotestdifferentmodels.
简介:“复审率为‘0’,行政诉讼案为‘0’”。这是某审计机关年度审计工作总结中,总结抓审计质量取得的成效时,所引用的两项指标。看到这里,我有两点感触。一是令人作喜。这几年,我们各级审计机关,时时讲质量,处处抓质量,审计工作年年结硕果,审计质量岁岁上台阶,一批批过得硬、叫得响的审计项目不断涌现,促使审计在领导心目中位次前移,在社会上地位提高,在维护财经法纪,促进经济建设、廉政建设等方面发挥了积极作用。这是主流,是有目共睹、无可争议的主流。二是喜中有忧。一个审计机关,一年当中少则审计十几、几十个,多则上百个单位,难道复审率、行政诉讼案真的个个都是“0”吗?其实并不尽然。现实中,少数审计人员因业务不精,造
简介: 一天,0从网上看到了一则数字委员会的公告,内容是这样的: 由于一些技术上的偏差,0被划在了自然数外,经专家反复审核,0确属自然数,特此声明,请广大网民相互转告!……
简介:一台多媒体计算机不仅是我们学习、工作的工具,还给我们提供了一个五彩缤纷的声音世界,在计算机硬件冰冷的电子世界里,如果我告诉你,我们编辑的文字、观看的动画、收听的音乐在计算机内统统都是一定位数的0和1在做着游戏,你相信吗?