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M(emu/g)Magnetic Phase Transition and MCE20016012080400Tc (K)2802602402202001.2 1.6 2.0 2.4Si content x0 60 120 180 240 300T(K)1Tx=1.2x=1.3x=1.4x=1.5x=1.6x=1.7x=1.8x=2.0x=2.4∆SM= −Hmax∫0⎛⎜⎝∂M∂T⎟⎠⎞HdHSharp M-T curvesLarge entropy ChangeLarge entropy Change infirst-order phase transition
Field-induced Magnetic Phase TransitionMagnetization Measurement-∆S(J/kg.K)282624222018161412108642LaFe11.7Si1.3H=1-5T0160 170 180 190 200 210 220 230µ 04πM(T)1.21.0LaFe 11.7Si 1.3@T=190 K0.80.60.4LaFe 11.0Si 2.0@T=240 K0.20.00 1 2 3 4 5T(K)µ 0H(T)
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The Nobel Prize in Physics 1961 Pre
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一、穆斯堡尔效应ï
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原子跃迁和原子核跃
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原子核 γ 射线的有反
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原子核 γ 射线的有反
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穆斯堡尔的实验 ( 一 )
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穆斯堡尔的实验 ( 一 )
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束缚在晶格中的原子
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穆斯堡尔的实验 ( 二 )
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无反冲分数严格按量
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无反冲分数的各向异
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穆斯堡尔核素有 46 种
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穆斯堡尔效应优点穆
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最原始的穆斯堡尔谱
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速度校准295 K α-Fe 标准
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穆斯堡尔谱仪I=5/2I=3/2I=
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穆斯堡尔谱仪探测器
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穆斯堡尔谱仪单道分
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Mˆ ssbauer SpectrometerVariable Te
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Applications of In-field Mˆ ssbaue
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High Temperature Equipment forMˆ s
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高压穆斯堡尔谱装置
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洛仑兹线形穆斯堡尔
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穆斯堡尔谱拟合方法
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穆斯堡尔谱学 (Mˆ ssbaue
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超精细相互作用和穆
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原子核在激发态和基
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在穆斯堡尔实验中 ,
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(2) 核电四极矩作用 -
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(2) 核电四极矩作用 -
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Ⅲ 磁偶极相互作用 :
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Ⅳ. 电和磁超精细相
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四极矩劈裂和四极矩
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超精细磁场来源(a) 轨
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超精细磁场来源(c) 费
Page 79 and 80: 超精细磁场来源ï 对
Page 81 and 82: 同质异能移给出的信
Page 83 and 84: Li 离子电池材料Li Fe 2+
Page 85 and 86: 利用四极矩劈裂确定
Page 87 and 88: H Aµ + Cµhf超精细磁场
Page 89 and 90: B(T)6c9d18f18hP(kBar)
Page 91 and 92: Non-magnetic57Fe(3≈ )56Fe(100≈
Page 93 and 94: 转移超精细磁场确定
Page 95 and 96: 研究原子的择优占位
Page 97 and 98: Phase separation in La 0.5 Ca 0.5 M
Page 99 and 100: 六个吸收峰的相对强
Page 101 and 102: 内转换电子穆斯堡尔
Page 103 and 104: 内转换电子穆斯堡尔
Page 105 and 106: Crystal Structure of Ideal ABO 3 Cr
Page 107 and 108: Jahn-Teller effecte gdx 2-y2d z2E J
Page 109 and 110: Jahn-Teller effecte gdx 2-y2d z2E J
Page 111 and 112: Local structural distortion of MnO
Page 113 and 114: Quadrupole splitting (∆) and crys
Page 115 and 116: Previous workOur resultsLa 0.69Ca 0
Page 117 and 118: Difficulty in obtaining reliable A
Page 119 and 120: Connection between Jahn-Teller coup
Page 121 and 122: Summaryï It is difficult to detect
Page 123 and 124: Magnetocaloric effect and magnetic
Page 125 and 126: Magnetic Entropy in Magnetic Materi
Page 127 and 128: Giant Magnetic entropy-∆S(J/kg.K)
Page 129: Magnetic Phase Transition and MCEEv
Page 133 and 134: Field-induced Magnetic Phase Transi
Page 135 and 136: Field-induced Magnetic Phase Transi
Page 137 and 138: 总结与展望穆斯堡尔
Page 139 and 140: 等加速模式穆斯堡尔
Page 141 and 142: 穆斯堡尔参数给出的
Page 143 and 144: 穆斯堡尔波谱学的应
Page 145 and 146: 结束语穆斯堡尔谱学
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