{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":2,"startPagecode":1},"records":[{"abstractinfo":"研究了(Nd 1- x La x ) 0.5Ca 0.5MnO 3(0≤ x ≤0.5)体系的X射线衍射谱,Raman吸收谱和电输运特性.通过电输运性质的测量给出了金属-绝缘转变温度 Tm 与 A 位离子平均半径之间的关联.结果表明,La 3+离子的掺杂压制低温下的电荷有序,导致金属-绝缘转变开始出现,且随掺杂浓度的增加,金属-绝缘转变( M-I )温度( Tm )向高温区移动,对应的峰值电阻率ρp 降低.X射线衍射谱和电输运特性均表明,La 3+离子的掺入使得 A 位平均离子半径(<rA>)增大,导致局部晶格畸变减小.在掺杂量0.3≤ x ≤0.5的区域范围内,随着 x 的增加,双交换作用逐渐增强,有利于低温下铁磁态的形成.但热循环实验的研究结果表明,这种铁磁态属于亚稳态,在能量上反铁磁态比铁磁态更稳定.","authors":[{"authorName":"王芳","id":"35e599ed-a8dd-4fb9-a058-8621ced5e955","originalAuthorName":"王芳"},{"authorName":"方军","id":"d1d59f61-3fc8-4020-9ea7-411f7bab19e6","originalAuthorName":"方军"},{"authorName":"<span style=\"color:red\">黄真</span>","id":"d53ce3d5-99bb-48ff-9668-6487633226c2","originalAuthorName":"黄真"},{"authorName":"田建军","id":"5b13dd0d-948b-4881-adc3-422ca2873e1f","originalAuthorName":"田建军"},{"authorName":"张勇","id":"1f966d1c-7319-4a66-9e59-b189322652fc","originalAuthorName":"张勇"},{"authorName":"陈治友","id":"2d2788aa-9f0b-4332-ac0c-0cf89fe76463","originalAuthorName":"陈治友"},{"authorName":"陈敬林","id":"3b91ccfe-514a-45a8-b670-bce4db13b8b9","originalAuthorName":"陈敬林"}],"doi":"10.3969/j.issn.1000-3258.2006.02.012","fpage":"147","id":"40b5e7c6-d972-455d-bd9c-77f01530b038","issue":"2","journal":{"abbrevTitle":"DWWLXB","coverImgSrc":"journal/img/cover/DWWLXB.jpg","id":"19","issnPpub":"1000-3258","publisherId":"DWWLXB","title":"低温物理学报   "},"keywords":[{"id":"31905a4e-671a-4a83-a514-ed240ba7465b","keyword":"钙钛矿锰氧化物","originalKeyword":"钙钛矿锰氧化物"},{"id":"308b6d95-6763-4085-bb37-97ab00afef3a","keyword":"金属-绝缘转变","originalKeyword":"金属-绝缘转变"},{"id":"55b3a58b-c1f9-4ff9-9549-05e35e6470e3","keyword":"离子尺寸效应","originalKeyword":"离子尺寸效应"}],"language":"zh","publisherId":"dwwlxb200602012","title":"钙钛矿锰氧化物(Nd1-xLax)0.5Ca0.5MnO3体系中的铁磁再入现象","volume":"28","year":"2006"},{"abstractinfo":"用固态反应法制备了具有单相结构的La0.5Ca0.5-xBaxMnO3系列样品, 其结构随Ba含量增加由立方晶系转变为典型的正交晶系.零场下输运性质实验表明,在较低掺杂量时, 系统在整个温区显示半导体型导电特征,而当掺杂量超过0.14时,系统发生由半导体到金属的转变,且转变的温度随掺杂量增加而移向高温端.基于对实验结果的分析, 就Ca位上Ba掺杂所起的作用进行了初步探讨.","authors":[{"authorName":"姜勇","id":"27a21d4a-20fc-486b-b292-878fe520a5ee","originalAuthorName":"姜勇"},{"authorName":"李广","id":"574fba84-8cc3-4550-aa93-1ad1ed1ef853","originalAuthorName":"李广"},{"authorName":"曾祥勇","id":"c2f34c19-6449-4b52-897e-c79bca30695a","originalAuthorName":"曾祥勇"},{"authorName":"汤萍","id":"1bc7acff-a830-4144-9469-ab636374b1b1","originalAuthorName":"汤萍"},{"authorName":"孙霞","id":"d053c705-1350-4d5a-90c1-1825f01f03db","originalAuthorName":"孙霞"},{"authorName":"<span style=\"color:red\">黄真</span>","id":"1680398e-6443-4b11-804f-e9b6884719cb","originalAuthorName":"黄真"},{"authorName":"袁松柳","id":"5ed76217-18aa-4daa-ade0-b177dcae7b80","originalAuthorName":"袁松柳"}],"doi":"10.3321/j.issn:1000-324X.2000.03.027","fpage":"531","id":"2515e7f5-6209-42bf-bf70-1446a630cfcb","issue":"3","journal":{"abbrevTitle":"WJCLXB","coverImgSrc":"journal/img/cover/WJCLXB.jpg","id":"62","issnPpub":"1000-324X","publisherId":"WJCLXB","title":"无机材料学报"},"keywords":[{"id":"937703ae-3c65-4b5e-b6c7-32a0bedeb56d","keyword":"超大磁电阻效应","originalKeyword":"超大磁电阻效应"},{"id":"9af34e84-ee6d-4e1d-bc7b-b0db4fc017eb","keyword":"双交换作用","originalKeyword":"双交换作用"},{"id":"d6252e76-6c06-401d-b3bc-678bf2e15789","keyword":"电荷有序化","originalKeyword":"电荷有序化"},{"id":"a979bf5d-41c7-4ce9-ab78-19cb132a43db","keyword":"A位平均离子半径","originalKeyword":"A位平均离子半径"}],"language":"zh","publisherId":"wjclxb200003027","title":"La0.5Ca0.5MnO3中Ca位上Ba掺杂效应研究","volume":"15","year":"2000"},{"abstractinfo":"本文主要介绍了双层类钙钛矿锰氧化物La1.4Ca1.6Mn2O7及其掺杂样品不同的制备工艺,分析了它们的XRD和R-T图像,讨论了制备方法对材料结构以及电磁性能的影响.","authors":[{"authorName":"李拥军","id":"8846e8ab-ea54-48d1-9557-4f1e76b94bc7","originalAuthorName":"李拥军"},{"authorName":"方军","id":"bc08593f-15aa-4aca-ace8-effadfd2888c","originalAuthorName":"方军"},{"authorName":"<span style=\"color:red\">黄真</span>","id":"bab108ac-faea-427e-8ad4-6d63c4a6d731","originalAuthorName":"黄真"},{"authorName":"刘智民","id":"d6efaace-e5be-499f-98b8-a0d225a08c9e","originalAuthorName":"刘智民"},{"authorName":"高秉钧","id":"3765de39-ddc6-4f81-8059-5a7b47a06a98","originalAuthorName":"高秉钧"}],"doi":"10.3969/j.issn.1000-3258.2002.03.009","fpage":"203","id":"0c51bd52-d0ed-41ba-8301-4401f35ed152","issue":"3","journal":{"abbrevTitle":"DWWLXB","coverImgSrc":"journal/img/cover/DWWLXB.jpg","id":"19","issnPpub":"1000-3258","publisherId":"DWWLXB","title":"低温物理学报   "},"keywords":[{"id":"540369de-e4e6-4234-94ff-7911d483c1a2","keyword":"","originalKeyword":""}],"language":"zh","publisherId":"dwwlxb200203009","title":"双层钙钛矿锰氧化物La1.4(Ca1-xSrx)1.6Mn2O7的制备工艺对材料结构和性能的影响","volume":"24","year":"2002"},{"abstractinfo":"我们对多晶样品Nd0.7Sr0.3Mn1-xCrxO3(x≤0.30)进行了X射线衍射谱、电阻温度关系和磁化强度测量.实验发现:随Cr掺杂量的增加,样品的电阻率变大,电阻峰温度和居里温度降低,这是由Cr的介入弱化了双交换作用所致;在x＝0.10附近,电阻出现了双峰现象,在其M～T上没有发现与低温峰对应的磁性异常;在锰位磁矩与Cr含量的关系中发现,Cr掺杂对样品的磁性几乎无贡献;通过分析,我们用相分离的图象解释了有关的现象.","authors":[{"authorName":"田建军","id":"d1ce102d-c62c-4949-a4ff-74b59cc7cea1","originalAuthorName":"田建军"},{"authorName":"方军","id":"7bb8b9c4-7575-48f6-a381-cac1c8b5ff91","originalAuthorName":"方军"},{"authorName":"王芳","id":"f8634cd8-5271-4945-9b6a-94a79de83031","originalAuthorName":"王芳"},{"authorName":"<span style=\"color:red\">黄真</span>","id":"44817a84-bc6a-41ee-ab9c-6e6ec92a361b","originalAuthorName":"黄真"},{"authorName":"陈治友","id":"5756490f-7068-41a9-a820-49defc8b97b0","originalAuthorName":"陈治友"},{"authorName":"陈敬林","id":"a5fef967-d662-4f56-a8b5-7dcfd7b618d1","originalAuthorName":"陈敬林"}],"doi":"10.3969/j.issn.1000-3258.2006.01.019","fpage":"86","id":"433bd37f-1bfe-4a67-ab9e-f0f22238f179","issue":"1","journal":{"abbrevTitle":"DWWLXB","coverImgSrc":"journal/img/cover/DWWLXB.jpg","id":"19","issnPpub":"1000-3258","publisherId":"DWWLXB","title":"低温物理学报   "},"keywords":[{"id":"df76a0e9-ba60-4aa3-ae10-cfd4bd2d46ca","keyword":"钙钛矿锰氧化物","originalKeyword":"钙钛矿锰氧化物"},{"id":"517b946e-dfde-4956-8ed5-c38fcb6aadc4","keyword":"锰位掺杂","originalKeyword":"锰位掺杂"},{"id":"51275c97-95d7-4628-a8ab-663941ffffd5","keyword":"电阻双峰","originalKeyword":"电阻双峰"},{"id":"e1eed38d-c86e-4d2d-8d86-42ce7d887cee","keyword":"相分离","originalKeyword":"相分离"}],"language":"zh","publisherId":"dwwlxb200601019","title":"Cr掺杂对Nd0.7Sr0.3MnO3电磁性质的影响","volume":"28","year":"2006"},{"abstractinfo":"考察了氟尼辛与β-环糊精包合物的制备与表征.采用超声波法制备包合物,并采用倒置相差显微镜法、紫外-可见吸收光谱法、红外光谱法、X射线衍射法、热分析等多种方法进行了物性鉴定.研究发现,最佳制备工艺为n(氟尼辛):n(β-环糊精)=2:3、包合时间为1h、包合温度为40℃.氟尼辛经β-环糊精包合后,证明有包合物形成.为氟尼辛加工制成各种剂型开辟了良好的前景.","authors":[{"authorName":"王建华","id":"e6b41858-7382-4200-b53f-eac142ecc1c6","originalAuthorName":"王建华"},{"authorName":"<span style=\"color:red\">黄真</span>","id":"02a3e3a3-d230-4c5c-80fb-d8458c6a1045","originalAuthorName":"黄真"}],"doi":"","fpage":"93","id":"61b7b050-d752-4ecf-b001-fe813ed4bee5","issue":"6","journal":{"abbrevTitle":"CLDB","coverImgSrc":"journal/img/cover/CLDB.jpg","id":"8","issnPpub":"1005-023X","publisherId":"CLDB","title":"材料导报"},"keywords":[{"id":"8d7c325f-257a-4331-aac6-6a8c26dd2d77","keyword":"β-环糊精","originalKeyword":"β-环糊精"},{"id":"4820ca48-7160-44fd-ad76-87aeb4a6f1eb","keyword":"氟尼辛","originalKeyword":"氟尼辛"},{"id":"3c32382b-e987-4ef7-8173-5be17fc85501","keyword":"超分子配合物","originalKeyword":"超分子配合物"},{"id":"6c39fe33-468f-4742-af94-b255b6c0e37f","keyword":"制备","originalKeyword":"制备"},{"id":"a785955a-3ef0-4d4e-a9d1-0fde3e94791f","keyword":"表征","originalKeyword":"表征"}],"language":"zh","publisherId":"cldb200906029","title":"氟尼辛与β-环糊精超分子配合物的制备及其表","volume":"23","year":"2009"},{"abstractinfo":"采用溶胶-凝胶法制备了不同颗粒尺寸的Pr0.5(Ca0.47Ba0.03)MnO3多晶样品.对样品进行电阻测量发现,随颗粒边界的减小,其电阻率随磁场的变化即ρ(H)曲线上台阶数目和位置发生变化;实验同时发现,热循环对样品低温下的基态也有很大的影响.实验结果表明,颗粒尺寸大小,可以有效地调节反铁磁相(AFM)和铁磁相(FM)之间的相互作用,从而对台阶效应产生影响.进一步证明了台阶效应与相应力有关.","authors":[{"authorName":"王芳","id":"c0bad177-d02d-4252-b884-d4998085c68e","originalAuthorName":"王芳"},{"authorName":"方军","id":"6670ac49-243e-45b5-add4-b88c101743db","originalAuthorName":"方军"},{"authorName":"<span style=\"color:red\">黄真</span>","id":"61b20ee5-4713-41e5-a06c-ef77ee379caa","originalAuthorName":"黄真"},{"authorName":"张勇","id":"559559dd-69bb-4eb6-9eeb-6db8d5e42660","originalAuthorName":"张勇"},{"authorName":"陈治友","id":"d171d8b0-585b-45c6-85c1-84aa4a8756c8","originalAuthorName":"陈治友"},{"authorName":"陈敬林","id":"f801989a-b7bf-4371-aa99-dca55d8b64c5","originalAuthorName":"陈敬林"}],"doi":"10.3969/j.issn.1000-3258.2006.01.006","fpage":"26","id":"95d63204-ed82-466d-91f9-792f3d1c0f99","issue":"1","journal":{"abbrevTitle":"DWWLXB","coverImgSrc":"journal/img/cover/DWWLXB.jpg","id":"19","issnPpub":"1000-3258","publisherId":"DWWLXB","title":"低温物理学报   "},"keywords":[{"id":"47c37056-56aa-4ba5-86f1-23d352f28e20","keyword":"钙钛矿锰氧化物","originalKeyword":"钙钛矿锰氧化物"},{"id":"1bf92e27-f041-4fee-9202-b4d2b936d609","keyword":"超大磁电阻效应","originalKeyword":"超大磁电阻效应"},{"id":"a9d7ff83-aa04-4193-93f3-fd9baa1ef8ba","keyword":"马氏体效应","originalKeyword":"马氏体效应"},{"id":"8249230f-111f-4817-8f10-1f14066bfd52","keyword":"边界效应","originalKeyword":"边界效应"}],"language":"zh","publisherId":"dwwlxb200601006","title":"晶粒尺寸对Pr0.5(Ca0.47Ba0.03)MnO3中台阶效应的影响","volume":"28","year":"2006"},{"abstractinfo":"以纯铬粉和Cr+RE[w(RE)=10%]硅铁粉末组合为原始粉末,利用行星球磨机,制备高铬合金层.采用X射线衍射、扫描电镜、能谱等方法分析合金层成分、显微结构及元素分布,并用多种实验手段检测合金层的显微硬度、抗热剥落能力及在NaCl和H2SO4腐蚀介质中的耐蚀性,以探讨稀土元素对合金层性能的影响.实验结果表明,合金层的显微硬度显著提高,抗剥落能力得到明显改善,在质量分数为3.5%的NaCl溶液中的耐腐蚀性能也得到较大提高.","authors":[{"authorName":"<span style=\"color:red\">黄真</span>","id":"c9f7bf83-0684-4f5b-bcaf-e589f9edd52b","originalAuthorName":"黄真"},{"authorName":"沈以赴","id":"0f921d0b-ecab-4bce-8a1e-d305ee393a6f","originalAuthorName":"沈以赴"}],"doi":"","fpage":"28","id":"a127e684-3e1a-4fc0-9ce3-46cf4eca91a6","issue":"7","journal":{"abbrevTitle":"GTYJXB","coverImgSrc":"journal/img/cover/GTYJXB.jpg","id":"30","issnPpub":"1001-0963","publisherId":"GTYJXB","title":"钢铁研究学报"},"keywords":[{"id":"5445ccbe-9d41-4ad8-88e3-d7596e12ab85","keyword":"铬合金层","originalKeyword":"铬合金层"},{"id":"3d93aa1e-1dbf-44b6-b431-667a34e9bc03","keyword":"稀土","originalKeyword":"稀土"},{"id":"896f4bee-7fc8-40da-b0da-e10268900921","keyword":"显微硬度","originalKeyword":"显微硬度"},{"id":"7d2d6551-71c8-4cb1-bf80-dfa8e7724c3c","keyword":"结合强度","originalKeyword":"结合强度"},{"id":"735200be-3cf9-4165-a3e7-0558f021368d","keyword":"耐蚀性","originalKeyword":"耐蚀性"}],"language":"zh","publisherId":"gtyjxb200907008","title":"稀土对机械合金化制备碳钢表面铬合金层的影响","volume":"21","year":"2009"},{"abstractinfo":"采用高能球磨机,利用机械合金化原理,在室温下于20钢表面制得Cr合金层.采用SEM、EDS、XRD和显微硬度测试等技术分析Cr层的显微形貌、组织结构及力学性能并初步探讨合金层的形成机理.结果表明.采用本实验工艺能在20钢表面形成界面结合良好且厚度为60-80 μm的Cr合金层.显微硬度测试表明,合金层最大显微硬度值高达661HV0.1,是基体硬度值的3倍多.界面处的显微硬度呈现梯度变化,对合金层起到很好的缓冲和支撑作用.分析其机理可知,大量机械能的输入促进了粉末与基体的结合,加快了原子问的扩散,使得Cr合金层得以形成.","authors":[{"authorName":"<span style=\"color:red\">黄真</span>","id":"78b80119-d227-4feb-a197-e20e89367a9a","originalAuthorName":"黄真"},{"authorName":"沈以赴","id":"50d0c808-b99a-4fcf-aaf9-e6b8e8bf0990","originalAuthorName":"沈以赴"},{"authorName":"朱永兵","id":"47d5b1fb-854a-48aa-a8dc-add5bc71476e","originalAuthorName":"朱永兵"},{"authorName":"顾冬冬","id":"20aff38b-861a-48f9-a43a-875001de67c8","originalAuthorName":"顾冬冬"}],"doi":"10.3969/j.issn.1004-244X.2008.02.015","fpage":"54","id":"a6e205f1-e29a-42f0-b643-be53a7d35fe8","issue":"2","journal":{"abbrevTitle":"BQCLKXYGC","coverImgSrc":"journal/img/cover/BQCLKXYGC.jpg","id":"4","issnPpub":"1004-244X","publisherId":"BQCLKXYGC","title":"兵器材料科学与工程   "},"keywords":[{"id":"699610b1-6d14-4a5d-8e68-c5276f23045d","keyword":"高能球磨","originalKeyword":"高能球磨"},{"id":"161091d0-5a66-4d2e-8919-3fc271c31fb5","keyword":"Or合金层","originalKeyword":"Or合金层"},{"id":"f7a84654-e51b-452c-9386-f62cc5c593a0","keyword":"界面","originalKeyword":"界面"},{"id":"0e425961-f850-4911-a099-45bb6e3ecc9a","keyword":"显微硬度","originalKeyword":"显微硬度"}],"language":"zh","publisherId":"bqclkxygc200802015","title":"低碳钢表面Cr合金层的低温高能球磨制备","volume":"31","year":"2008"},{"abstractinfo":"实验研究了La0.5Ca0.5MnO3系统Ca位上Ba掺杂对其磁电阻效应的影响.结果表明,掺杂量低于0.2的样品,磁电阻效应随温度降低而增大,在转变温度附近达到最大值,然后随温度降低而变小,随着温度进一步降低磁电阻效应再次增大.而对于掺杂量高于0.2的样品,磁电阻效应在整个温区随温度降低而单调增加.文中通过考虑铁磁性和反铁磁性两种效应的竞争而对实验观察给出解释.","authors":[{"authorName":"姜勇","id":"d555f81c-c358-4d58-a2ed-44f9179c1bc1","originalAuthorName":"姜勇"},{"authorName":"李广","id":"9d5f2616-4e3d-416c-b791-1414fe748acc","originalAuthorName":"李广"},{"authorName":"李建青","id":"a8e5cb5a-a7c7-40db-8265-6360be964573","originalAuthorName":"李建青"},{"authorName":"<span style=\"color:red\">黄真</span>","id":"5b664aa0-bad9-4af7-a291-21c88267d883","originalAuthorName":"黄真"},{"authorName":"王胜","id":"910f4844-cf70-4389-a880-f132a4620fd5","originalAuthorName":"王胜"},{"authorName":"袁松柳","id":"5926242e-a2f9-468a-8b5f-ee9e8cd39107","originalAuthorName":"袁松柳"}],"doi":"10.3969/j.issn.1000-3258.2000.02.010","fpage":"130","id":"b256ef6a-7902-4b4e-ae02-fdb4ad4b59b5","issue":"2","journal":{"abbrevTitle":"DWWLXB","coverImgSrc":"journal/img/cover/DWWLXB.jpg","id":"19","issnPpub":"1000-3258","publisherId":"DWWLXB","title":"低温物理学报   "},"keywords":[{"id":"236de85c-0dcb-499d-ae14-6737b6e4d3cb","keyword":"","originalKeyword":""}],"language":"zh","publisherId":"dwwlxb200002010","title":"La0.5Ca0.5-xBaxMnO3体系中的异常磁电阻行为","volume":"22","year":"2000"},{"abstractinfo":"实验研究了La0.5Sr0.5MnO3体系La位上Y掺杂对电荷有序相的影响.结果表明掺杂量为0.15以下时,样品均呈现金属-绝缘体转变行为;当掺杂量为0.2,0.25时样品中出现了电荷有序相.通过对样品的结构和输运特性的仔细研究,发现有三种因素对其输运特性具有重要影响:带宽即〈TA〉,eg电子的轨道,无序度σ2.同时,实验结果表明电荷有序相的形成是因为电子之间的强关联作用的结果.","authors":[{"authorName":"朱永文","id":"7d1faf56-c5b2-46dd-bb5a-888d97c5f970","originalAuthorName":"朱永文"},{"authorName":"方军","id":"237639ac-823d-4efe-87e1-04606ea0ab77","originalAuthorName":"方军"},{"authorName":"<span style=\"color:red\">黄真</span>","id":"1c397e56-2d45-4d73-9681-0e568fe1a2f6","originalAuthorName":"黄真"},{"authorName":"高秉钧","id":"c7e0031c-2808-4673-929b-bae75f8f673f","originalAuthorName":"高秉钧"}],"doi":"10.3969/j.issn.1000-3258.2003.02.014","fpage":"151","id":"c4e6b6ef-b51b-4a3b-b405-df0ec2b83fd1","issue":"2","journal":{"abbrevTitle":"DWWLXB","coverImgSrc":"journal/img/cover/DWWLXB.jpg","id":"19","issnPpub":"1000-3258","publisherId":"DWWLXB","title":"低温物理学报   "},"keywords":[{"id":"3d7cc885-09fe-433e-97fa-957491ce9925","keyword":"电荷有序","originalKeyword":"电荷有序"},{"id":"64cb1bb3-6071-4e33-aef8-f71f45a633b1","keyword":"强关联作用","originalKeyword":"强关联作用"},{"id":"256c9a87-0645-4591-bbf7-76500f28cc20","keyword":"带宽","originalKeyword":"带宽"},{"id":"26335b2e-fc57-474e-8fd2-7d12c5ad495c","keyword":"eg电子的轨道","originalKeyword":"eg电子的轨道"},{"id":"c7cff218-a040-4643-aaaf-0b46613eff3d","keyword":"无序","originalKeyword":"无序"}],"language":"zh","publisherId":"dwwlxb200302014","title":"(La1-x Yx)0.5Sr0.5MnO3体系的结构和输运性质研究","volume":"25","year":"2003"}],"totalpage":2,"totalrecord":12}