PEMBUATAN BATANG PELET La2-2XSr1+2XMn2 O7 SEBAGAI BAHAN PENUMBUH KRISTAL TUNGGAL[

Agung Imaduddin

Abstract

Bahan oksida Mn telah lama diketahui mempunyai sifat magneto resistance (hambatan listrik dalam medan magnet) yang besar. Untuk dapat mempelajari sifat fisika dari elektronnya, diperlukan kristal tunggal dengan kualitas  yang  tinggi.  (La,  Sr) 1+n Mnn O3n+1   (n=2)  yang  mempunyai  lapisan  Mn-O  yang  berdekatan  2  lapis, mempunyai sifat magneto resistance yang terbesar dibandingkan grup n = 1, maupun n = ∞. Pada penelitian ini telah dipelajari proses pembuatan batang pellet yang digunakan sebagai bahan penumbuh kristal tunggal. Batang pellet hasil proses kemudian dianalisa dengan DTA/DTG (Differential Thermal Analysis/Differential Thermal Gravimetry) dan XRD (X-Ray Diffraction).

 

Abstract

Mn oxide has long been known having a large magneto resistance properties. In order to study the physical properties of the electron, high quality of single crystal is required. (La, Sr), Superkonduktor, Kristal tunggal, DTA/DTG
1 + nMnnO3n +1 (n = 2) which has two layers of Mn-O, has the largest magneto resistance properties in comparison with group n = 1, and n = ∞. In this research, manufacturing of pellet rod that will be used as a raw material for growing single crystal is studied. Then, pellet rod product is analyzed by using DTA/DTG (Differential Thermal Analysis/Differential Thermal Gravimetry) dan XRD (X-Ray Diffraction).

Keywords

La2-2X Sr1+2X Mn2 O7; Superkonduktor; Kristal tunggal; DTA/DTG; La2-2XSr1+2XMn2O7 ; Superconductors; Single crystal; DTA/DTG

References

T. Kimura, Y. Tomioka, H. Kuwahara, A. Asamitsu, M. Tamura, “Interplane Tunneling Magnetoresistance in a Layered Manganite Crystal”, Science vol 274, 6 Dec 1996 hal 1698.

R. Suryanarayanan, J. Berthon, I. Zelenay, B. Martinez, X. Obradors, “Semiconductor – metal transition, thermoelectric power and giant magneto resistance of the double Mn perovskite La 1.5 Ca 1.5 Mn 2 O 7

Agung Imadu ddin, (2001) “ Growth and physical properties of La ”, Physica B 259 -261 (1999) 837 -838. 2- 2x Sr 1+2x Mn 2 O 7

H. Kanazawa, (2000), “ FZ method growth and appraisal of La single crystals ”, Iwate University. 2- 2x Sr 1+2x Mn 2 O 7

Agung Imaduddin, “Metoda FZ pada Pembuatan Kristal Tunggal La single crystals ”, Iwate University. 2- 2x Sr 1+2x Mn 2 O 7

A. Urushibara, Y. Moritomo, T,Arima, A. Asamitsu, G. Kido, Y. Tokura, ”, Metalurgi, April 2011, preprint . (1995), “ Insulator -metal transition and giant magnetoresistance in La 1- x Sr x MnO 3

J.A.M. van Roosmalen, P. van Vlaanderen, E.H.P. Cordfunke, (1995) “Phase in the perovskite- Type LaMnO ”, Physical Review B, vol 51, 20, hal .14103. 3+ Solid Solution and the La 2 O 3 -Mn 2 O 3 Phase Diagram”, Journal of Solid State Chemistry 114, hal. 516- 523.

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