GdRh, a ferromagnetic intermetallic, is of interest as a working material for magnetic refrigeration. The requirements for such materials have been discussed by Barclay et al. and it is in this context that we analyze our data. Magnetic measurements of Buschow et al. have indicated TC =24 K while specific heat measurements of Olijhoek et al. have shown a maximum at 20 K and have yielded a magnetic entropy of 16.7 J/mole K. No Debye temperature has been reported previously. We have measured the specific heat from 1.8 to 77 K and our data show a peak at 19.93 K that is 17% higher than in the previous work. Fitting of the data from 40 to 77 K to C=A/T2+𝒟(T/θ{T}), where A and θ{T} are adjustable parameters and 𝒟 is the Debye function, yields a Debye temperature of 198±2 K. For the magnetic entropy we obtain 17.4 J/K, very close to R ln 8.

The generalized Hubbard model is an important theoretical model for modeling strongly correlated materials. To be able to theoretically predict the properties of the materials, the model requires Hubbard's and Hund's parameter that represent the on-site Coulomb and exchange interaction, respectively. For bare Coulomb interactions, the analytic expression of and are analytically described by Racah's , , parameters. However, the values of are too large for transition-metal-based materials. To obtain more accurate values for realistic materials, we employ a Yukawa-type screened Coulomb interaction, characterized by screening constant . We characterize for transition metals. The modified , , parameters give a more realistic and values.

Biasanya manusia mengontrol perangkat elektronik rumah dengan cara manual tetapi dengan penerapan rumah cerdas maka perangkat elektronik dapat dikontrol dengan menggunakan satu pengontrol pusat saja. Berdasarkan hal tersebut maka diperlukan sebuah mini pc yaitu sebuah perangkat komputer kecil atau mini. Mini pc yang digunakan adalah Raspberry pi, dengan Raspberry Pi yang menerapkan teknologi jaringan wireless dan wire yang dihubungkan dengan teknologi smartphone yang saat ini menjadi reward dalam perkembangan dunia teknologi. Tujuan penelitian ini adalah mendapatkan kemudahan dalam mengontrol perangkat elektronik yang ada didalam rumah dengan cara pengontrolan terpusat pada sebuah smartphone android. Sistem yang dirancang untuk mengontrol aktif dan non-aktif. perangkat seperti lampu, kipas angin, dan televisi ini dirancang dengan menggunakan LXTerminal pada raspbian, bahasa Python dan Android Studio sebagai sarana untuk membuat perangkat lunaknya. Pengujian dilakukan dengan menampilkan beberapa menu pada display aplikasi disertai dengan meletakkan seluruh perangkat keras yang sudah disusun dengan baik. Hasil pengujian menunjukkan bahwa perangkat elektronik seperti lampu, kipas angin, dan televisi berhasil dilakukan pengontrolannya (aktif dan non-aktif).,

Spin transfer torque in a multilayer magnetic system can be understood in terms of interaction between a normal metal and a ferromagnetic layer on the multilayer, in which the interaction is characterized by the magnetic susceptibility. Most of experimental studies on this subject utilizes heavy metals, such as Pd and Pt, while a recent theory assumes a light metal as the normal metal. We aim to reconcile this discrepancy and achieve consistency with the experiments by studying magnetic susceptibility of Pd and Pt. We theoretically investigate the complex magnetic susceptibility of Pd and Pt by combining Tight-binding Approximation, Hubbard Model, and Density Functional Theory. We calculate a single band susceptibility for Pd and Pt. Our results show that the band structure is dominated by the d-orbitals and the susceptibility is enhanced by its large repulsive interaction.

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