电子衍射图谱解析——中国科学技术大学张庶元

12TEMTEM31927192720203030E.RuskaE.Ruska7070TEMTEM4XX1010445TEMTEMXX6TEMTEMAbbeAbbe7TEMTEM(SAED)(SAED)200kv200kv0.10.1TEMTEMSAEDSAED(a)(b)(c)(a)(b)(c)(d)(d)(a)(a)(b)(b)1.01.0TEMTEM(SAED)(SAED)(c)(c)(d)(d)0.10.1(((a)(a)AATEMTEM(b)(b)(d)(d)8(Bragg)(Bragg)λλθθλθλθLRddLLSinLtgRdSinnSindhkl==≈===22212LLLL::RRd:d:9gg[[uvwuvw]]0][=++=•wlvkuhguvwhklgg11gg22],1,[][2121212212121lkklkllhkhhkgguvw−−−=×=MillerMillerLaueLaue10d=d=LLλλ//RRddJCPDFJCPDFddhklhkl1111AABBrr11rr22rr11rr2222rrd=d=LLλλAABBdd11dd22,,JCPDFJCPDFdd11dd22{hkl}{hkl}11{hkl}{hkl}2233{hkl}{hkl}11(h(h11kk11ll11))AA{hkl}{hkl}22BB(h(h22kk22ll22))(h(h11kk11ll11))(h(h22kk22ll22))44[uvw][uvw]OOAABB12AABBrr119.9mm9.9mm17.2mm17.2mm7474LLλλ=20.08mmA=20.08mmAαα−−FeFeJCPDFJCPDFhklhklhklhklBBAArr11rr22rr11dd2.028A2.028A1.167A1.167Add2.027A2.027A1.170A1.170A{{hklhkl}}{110}{110}11{112}{112}221333(110)(110)AA{112}{112}(110)(110)(121)(121)(211)(211)(121)(121)(211)(211)(110)(110)(211)(211)BB44222222212121212121coslkhlkhllkkhh++++++=ϕ]311[]112[]110[][=×→uvwBBAA00000011011011011012112121121112112121121114ddJCPDSJCPDSJCPDFJCPDFbbhhkkllhhkkhhkk1616aahhkkll4848222lkhad++=222222clbkahad++=15cchhkkll88222222clbkahad++=ddkk44ββββ222222222sincos2sinsinachlclbkahad−++=edhkl216)(34122222clakhkhd+++=fhkhklhkihkhkihkhkl243)21(=+−=i12324123123123123213213213213133133133133313313313313233233233233323323323323171819b*b*b*b*c*c*c*c*1231111152520)2(sinsinsin2coscoscos12221ββααβαθ−+∆∆=112βββααα−=∆−=∆2βαθ∆∆≈coscoscosαβ21BiBiEDSEDSBiBi44(SrLa)(SrLa)88CuCu55OO77))CC**0.00.012.912.924.724.734.634.649.049.0bb**cc**10010000800808008022a*b*a*b*a*b*12.911.89.914.4aa5.39A5.39Abb23.5A23.5Acc34.0A34.0A23P2P2P2/nP2/nbb**884488(010)(010)**0k00k04488(010)*(010)*(010)*(010)*h0l(h+l=2n+1)h0l(h+l=2n+1)001001102102201201nnP2P224Bragg321ggg=[phone]lkhlkhlkh=+11100211100000200225000000010010011011012012011011010010011011012012011011012012012012001001002002002002000000110110112112110110112112112112112112002002002002(110)(110)**(100)(100)**26NdNd22FeFe1414BB020200002002110200aacc300300003003bbh+lh+l=2n+1=2n+1321ggg=+h0lh0lh+lh+l=2n+1=2n+127(h(h22kk22ll22))(h(h11kk11ll11))hh11kk11ll11hh22kk22ll22gg22**gg11**gg33**gg22**GG11GG33GG22hh22kk22ll22GG22hh33kk33ll33GG11GG3328NiTiCNiTiCTiCTiCD2D1D3T2930gAgTgMhklMhklT-gMTMgMhklMhklTgThklMhklTgTgMhklMhklTgTgM18018031gM(hkl)MgT(hkl)TgA(pqr)htktlt(hkl)T(hkl)TATAMgggg•=•tktrltqphrlqkph++=++TM//gAATAMgggght•=•−rllqkkphhttt−=−=−(1)(2)gAgTgMhklMhklT-gMTM[pqr](pqr)hklm32(1)(2)(1)(2)(3)⎪⎪⎪⎩⎪⎪⎪⎨⎧+++++−=+++++−=+++++−=)(2)(2)(2222222222rlqkphrqprllrlqkphrqpqkkrlqkphrqpphhttt(hkl)T(htktlt)3(hkl)T33f.c.cf.c.c{{pqrpqr}={111}}={111}b.c.c{pqr}={112}⎪⎪⎪⎩⎪⎪⎪⎨⎧+++−=+++−=+++−=)(32)(32)(32rlqkphrllrlqkphqkkrlqkphphhttt⎪⎪⎪⎩⎪⎪⎪⎨⎧+++−=+++−=+++−=)(3)(3)(3rlqkphrllrlqkphqkkrlqkphphhttt34„„„„[[uvwuvw]]„„[[uvwuvw]][[uuttvvttwwtt]]⎪⎪⎪⎩⎪⎪⎪⎨⎧+++++−=+++++−=+++++−=)(2)(2)(2222222222rwqvpurqprwwrwqvpurqpqvurwqvpurqppuuttt„„((pqrpqr))[[uuttvvttwwtt]]„„((uuttvvttwwtt))**((uuttvvttwwtt))**„„(3)(3)35eeMMTT180180111111111111200200111111111111200200200200111111111111200200(011)(011)**(011)(011)**36fcc37{111}[123][utvtwt][123]{pqr}(111)(111)(111)(111)[utvtwt][321][111][111][123][321]242511824511242824000333333111222222111(123)*242333428115000115428333242222111111222(321)*38(321)*(khl)T(htktlt)115242333111428333242511(511)82431313124224251133382442800033311533311551124282442833324211111111111139[uvw][xyz][pqr](pqr)[uvw][uvw][pqr][xyz][pqr][xyz][pqr][uvw][xyz][xyz][xyz][pqr]40b.c.cSAED41000[120][xyz]=[421][xyz]=[uvw][pqr]{112}217424422420422[120]215211121200002121211002211121[421][012]42(3)(3)⎪⎩⎪⎨⎧+++−=+++−=+++−=))(3())(3())(3(ttttttttttttrlqkphrllrlqkphqkkrlqkphphhABCABC)712(31)(=Atttlkh)112()(=Ctttlkh)244(31)(=Btttlkh(hkl)A(121)(hkl)B(200))211()(=Chkl[012]43TEMTEMZnSeZnSe70.570.5SAEDSAEDZnSeZnSe70.570.5HRTEMHRTEMZnSeZnSe{111}{111}ZnSeZnSe{111}{111}707044ZnSZnS,,bbaa1010ccbbZnSZnSZnSZnSZnSZnS45SAEDSAED46„„„„AuCuAuCu33AuCuAuCu33,,f.c.cf.c.chhkkllAuCuAuCuAuAuCuCuf.c.cf.c.c[001][001]f.c.cf.c.c000000200200020020220220000000100100200200010010110110210210020020120120220220[001][001][001][001]47aa11bb11TTQQQQ[001][001]TT[001][001]TTQQMXMX33TQTQTQ2TQ2TQ4TQ448f.c.cf.c.cA1A1b.ccb.ccA2A2h.c.ph.c.pA3A33349GaInPGaIn{111}111GaP/InP111Ga0.5In0.5P111111Ga0.5In0.5P[110]Ga0.5In0.5P[110]5051[010][010]〉〈=11261RAABBCCBBCCABCABCABCABC…………..f.c.cf.c.c111111[111][111]RRABABABABABAB…………..[001][001]SiCZnSCdI252EEABCBCACABABCBCACABABCBCACABABCBCACAB…………..LLmmppL=L=m+pm+pL=L=m+pm+p=2+1=3=2+1=3E=3LE=3Lm=1m=1pp11L=2L=2E=LE=L22ABABABABABABABABABABABAB…………....53RamsdellRamsdell2H2H4H4H6H6H…………3R3R9R9R15R15R…………HHE=LE=LRRE=3LE=3L6H6H669R9R99mm--pp3n3nHHmm--pp3n3n11RR54∑∑∑++++=CilzkhiBilzkhiAilzhklCBAeeeeeFπππππ2)2(322)2(322∑A∑B∑CAABBCCZZ,,,,HHRRL=1L=1f.c.cf.c.cABCABCABCABC············[00l][00l]**HHRR55h+k=3n00lH00LR003L(00E)h+k=3n1h+k=1HL1/LRL1/Lh+k=3n11/3L5600L00L6H6H00600615R15R001500156H6H1001001001001061061061066H6H[010][010]15R15R[010][010]57AuAuAgAg111111{422}{422}f.c.cf.c.c31HRTEMHRTEM33{422}{422}583131111111AAB.CB.CA